# programming * [basic](#basic) * [get environment](#get-environment) * [Program structure](#program-structure) * [Customizable Operators](#customizable-operators) * [Special Operators](#special-operators) * [elvis operator](#elvis-operator) * [if/elseif{if}/else](#ifelseififelse) * [execute shell commands in groovy](#execute-shell-commands-in-groovy) * [Get STDERR & STDERR](#get-stderr--stderr) * [Show output during the process](#show-output-during-the-process) * [with environment](#with-environment) * [groovyConsole](#groovyconsole) * [environment](#environment) * [get console details](#get-console-details) * [font](#font) {% hint style="info" %} > download > > * [apach software foundatin distribution directory](https://dlcdn.apache.org/) > * [groovy](https://dlcdn.apache.org/groovy/) > * [2.4.21](https://dlcdn.apache.org/groovy/2.4.21/) > * [2.5.19](https://dlcdn.apache.org/groovy/2.5.19/) > * [3.0.13](https://dlcdn.apache.org/groovy/3.0.13/) > * [4.0.6](https://dlcdn.apache.org/groovy/4.0.6/)
> > reference: > > * [\* Groovy Language Documentation](https://docs.groovy-lang.org/latest/html/documentation) > * [\* Groovy Scripting Reference](https://docs.oracle.com/en/cloud/saas/applications-common/21d/cgsac/index.html) > * [groovy basics](https://docs.oracle.com/en/cloud/saas/applications-common/21d/cgsac/groovy-basics.html#groovy-basics) > * [groovy tips and techniques](https://docs.oracle.com/en/cloud/saas/applications-common/21d/cgsac/groovy-tips-and-techniques.html#groovy-tips-and-techniques) > * [\* groovy cheatsheet](https://onecompiler.com/cheatsheets/groovy) > * [\* Groovy Cookbook](https://e.printstacktrace.blog/groovy-cookbook/) > * [\* varargs in Groovy](https://docs.groovy-lang.org/latest/html/documentation/#_varargs) > * [varargs : Variable Arguments (Varargs) in Java](https://www.geeksforgeeks.org/variable-arguments-varargs-in-java/) > * [online compiler](https://onecompiler.com/groovy) > * > * [Syntax](https://groovy-lang.org/syntax.html) > * [Five Cool Things You Can Do With Groovy Scripts](http://www.kellyrob99.com/blog/2011/12/04/five-cool-things-you-can-do-with-groovy-scripts/) > * [Java SE Specifications download](https://docs.oracle.com/javase/specs/) > * The Java Language Specification, Java SE 19 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se19/jls19.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se19/html/index.html) > * The Java Language Specification, Java SE 18 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se18/jls18.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se18/html/index.html) > * The Java Language Specification, Java SE 17 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se17/jls17.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se17/html/index.html) > * The Java Language Specification, Java SE 16 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se16/jls16.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se16/html/index.html) > * The Java Language Specification, Java SE 15 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se15/jls15.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se15/html/index.html) > * The Java Language Specification, Java SE 14 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se14/jls14.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se14/html/index.html) > * The Java Language Specification, Java SE 13 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se13/jls13.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se13/html/index.html) > * The Java Language Specification, Java SE 12 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se12/jls12.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se12/html/index.html) > * The Java Language Specification, Java SE 11 Edition : [pdf](https://docs.oracle.com/javase/specs/jls/se12/jls11.pdf) | [html](https://docs.oracle.com/javase/specs/jls/se11/html/index.html) > {% endhint %} > \[!TIP][Java Tutorial](https://jenkov.com/tutorials/java/index.html) : > > * [Java Exception Handling](https://jenkov.com/tutorials/java-exception-handling/index.html) > * [Java Tips, How-tos etc](https://jenkov.com/tutorials/java-howto/index.html) > * [Java JSON Tutorial](https://jenkov.com/tutorials/java-json/index.html) > * [Java Logging](https://jenkov.com/tutorials/java-logging/index.html) > * [Java Performance](https://jenkov.com/tutorials/java-performance/index.html) > * [Java Regex - Java Regular Expressions](https://jenkov.com/tutorials/java-regex/index.html) > * [Java Unit Testing](https://jenkov.com/tutorials/java-unit-testing/index.html) > * [朝花夕拾——Groovy & Grails](http://www.blogjava.net/BlueSUN/archive/2007/12/archive/2007/04/23/112978.html) ### basic #### get environment ```groovy $ groovy -e "println System.getProperty('java.specification.version')" 24 ``` ```groovy $ groovy -e "println System.getProperties().findAll { it.key.toLowerCase().contains( 'java' ) && it.key != 'sun.java.command' }.collect { \">> \${it.key} -> \${it.value}\" }.join('\n')" >> java.specification.version -> 24 >> java.runtime.version -> 24.0.1 >> java.class.path -> /opt/groovy/current/lib/groovy-4.0.26.jar >> java.vm.vendor -> Homebrew >> java.runtime.name -> OpenJDK Runtime Environment >> java.vendor.url -> https://github.com/Homebrew/homebrew-core/issues >> java.vm.specification.version -> 24 >> java.vm.name -> OpenJDK 64-Bit Server VM >> java.vendor.version -> Homebrew >> sun.java.launcher -> SUN_STANDARD >> java.vendor.url.bug -> https://github.com/Homebrew/homebrew-core/issues >> java.io.tmpdir -> /var/folders/8g/68t3rg090jd2tpqjcwm9vskh0000gq/T/ >> java.version -> 24.0.1 >> java.specification.vendor -> Oracle Corporation >> java.vm.specification.name -> Java Virtual Machine Specification >> java.version.date -> 2025-04-15 >> java.home -> /opt/homebrew/Cellar/openjdk/24.0.1/libexec/openjdk.jdk/Contents/Home >> java.vm.compressedOopsMode -> Zero based >> java.library.path -> /Users/marslo/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. >> java.vm.specification.vendor -> Oracle Corporation >> java.specification.name -> Java Platform API Specification >> java.vm.info -> mixed mode, sharing >> java.vendor -> Homebrew >> java.vm.version -> 24.0.1 >> java.class.version -> 68.0 ``` ```groovy // sun.java.comman in groovyConsole println System.getProperty("sun.java.command") // org.codehaus.groovy.tools.GroovyStarter --main groovy.console.ui.Console --conf /opt/homebrew/opt/groovy/libexec/conf/groovy-starter.conf --classpath .:/opt/homebrew/opt/openjdk/lib/tools.jar:/opt/homebrew/opt/openjdk/lib/dt.jar:/opt/homebrew/opt/groovy/libexec/lib:. // sun.java.command in cmd $ groovy -e 'println System.getProperty("sun.java.command")' // org.codehaus.groovy.tools.GroovyStarter --main groovy.ui.GroovyMain --conf /opt/groovy/current/conf/groovy-starter.conf \ --classpath .:/opt/homebrew/Cellar/openjdk/24.0.1/libexec/openjdk.jdk/Contents/Home/lib/tools.jar:/opt/homebrew/Cellar/openjdk/24.0.1/libexec/openjdk.jdk/Contents/Home/lib/dt.jar:/opt/groovy/current/lib/...jar:/opt/jenkins/latest/WEB-INF/lib/...jar:/opt/jenkins/plugins/credentials/WEB-INF/lib/...jar:. -e println System.getProperty("sun.java.command") ``` #### [Program structure](https://groovy-lang.org/structure.html) #### Customizable Operators | Operator | Method | | :------------: | --------------- | | `a + b` | `a.plus(b)` | | `a - b` | `a.minus(b)` | | `a * b` | `a.multiply(b)` | | `a / b` | `a.div(b)` | | `a % b` | `a.mod(b)` | | `a++` or `++a` | `a.next()` | {% hint style="info" %} > ```groovy > assert [ a: true, b: false ] + [ a: false ] == [ a: false, b: false ] > assert [ a: true, b: false ] << [ a: false ] == [ a: false, b: false ] > ``` > > * [difference `+`(plus) and `<<`(left shift)](https://stackoverflow.com/a/13326983/2940319) : > * [`<<` is to add into left hand map](https://github.com/groovy/groovy-core/blob/GROOVY_2_4_X/src/main/org/codehaus/groovy/runtime/DefaultGroovyMethods.java#L12296) > * [`+` it constructs a new Map based on the LHS\`](https://github.com/groovy/groovy-core/blob/GROOVY_2_4_X/src/main/org/codehaus/groovy/runtime/DefaultGroovyMethods.java#L7433) > {% endhint %} #### Special Operators | Operator | Meaning | Name | | :---------: | -------------------------------------------- | -------------- | | `a ? b : c` | `if(a) b else c` | ternary if | | `a ?: b` | `a ? a : b` | Elvis | | `a.?b` | `( a==null ) ? a : a.b` | null safe | | `a(*list)` | `a(list[0], list[1], ...)` | spread | | `list*.a()` | `[list[0].a, list[1].a, ...]` | spread-out | | `a.&b` | reference to method b in object a as closure | method closure | | `a.@field` | direct field access | dot-at | * [`.&` : Method pointer operator](https://docs.groovy-lang.org/latest/html/documentation/core-operators.html#method-pointer-operator) ```groovy def str = 'example of method reference' def fun = str.&toUpperCase assert fun() == str.toUpperCase() println fun() // result EXAMPLE OF METHOD REFERENCE ``` ```groovy class Person { String name Integer age } def list = [ new Person( name: 'Bob' , age: 42 ) , new Person( name: 'Julia' , age: 35 ) ] String describe(Person p) { "$p.name is $p.age" } def action = this.&describe def transform( List elements, Closure action ) { elements.inject([]){ result, e -> result << action(e) result } } println transform( list, action ) // result // [Bob is 42, Julia is 35] ``` ### elvis operator #### if/elseif{if}/else {% hint style="info" %} > references: > > * [5.3. Elvis operator](https://groovy-lang.org/operators.html#_elvis_operator) > * [Groovy Goodness: The Elvis Assignment Operator](https://blog.mrhaki.com/2020/02/groovy-goodness-elvis-assignment.html) > > usage > > * `?:` ( existing Elvis operator ) > > ```groovy > displayName = user.name ? user.name : 'Anonymous' > displayName = user.name ?: 'Anonymous' > ``` > * `?=` ( new elvis assignment shorthand ) > > ```groovy > name = name ?: 'Hydrogen' // existing Elvis operator > atomicNumber ?= 2 // new Elvis assignment shorthand > ``` {% endhint %} > condition: > > * if `fruits` is 'apple' or 'orange', get pre-defined number `5` ( `number = 5` ) > * if `fruits` is `watermelon`, get particular given `numbers`. `number` cannot be `null` ```groovy // by using if/elseif{if}/else Map option = [:] if ( [ 'apple', 'orange' ].contains(fruits) ) { option = [ "${fruits}" : '5' ] } else if ( [ 'watermelon' ].contains(fruits) ) { if (number) { option = [ "${fruits}" : number ] } } else { println( 'ERROR: number CANNOT be empty while fruits is watermelon. Exit ...' ) } // by using elvis operator Map option = ( [ 'apple', 'orange' ].contains(fruits) ) ? [ "${fruits}" : '5' ] : ( [ 'watermelon' ].contains(fruits) ) ? ( number ) ? [ "${fruits}" : number ] : println( 'ERROR: number CANNOT be empty while fruits is watermelon. Exit ...' ) : [:] ``` * example ```groovy Closure option = { String fruits, String number = '' -> ( [ 'apple', 'orange' ].contains(fruits) ) ? [ (fruits) : '5' ] : ( [ 'watermelon' ].contains(fruits) ) ? ( number ) ? [ (fruits) : number ] : println( 'ERROR: number CANNOT be empty while fruits is watermelon. Exit ...' ) : [:] } assert option('apple') == ['apple' : '5'] assert option('watermelon', '100') == [ 'watermelon' : '100' ] ``` {% hint style="info" %} > * using `[ "${fruits}" : '5' ]`, the class of key is `class org.codehaus.groovy.runtime.GStringImpl` > * using `[ (fruits) : '5' ]` , the class of key is `class java.lang.String` > {% endhint %} ### execute shell commands in groovy {% hint style="info" %} > reference > > * [101 groovy script - Execute commands](https://groovy-lang.gitlab.io/101-scripts/basico/command_local-en.html) > * [Jenkins Groovy script to execute shell commands](https://stackoverflow.com/a/46488427/2940319) > * [java.lang.Process](http://docs.groovy-lang.org/latest/html/groovy-jdk/java/lang/Process.html) > * [gist: Run shell command in groovy](https://gist.github.com/remen/31e798670783261c8a93) > {% endhint %} #### Get STDERR & STDERR > \[!TIP]\ > using `new StringBuffer()` or `new StringBuilder()` > > i.e.: > > ```groovy > def stdout = new StringBuffer(), stderr = new StringBuffer() > def proc = "cmd".execute() > proc.waitForProcessOutput( stdout, stderr ) > int exitCode = proc.exitValue() > println( (exitCode == 0) ? stdout : "exit with ${exitCode}. error: ${stderr}" ) > ``` ```groovy def stdout = new StringBuilder(), stderr = new StringBuilder() def proc = "ls /tmp/NoFile".execute() proc.consumeProcessOutput( stdout, stderr ) proc.waitForOrKill( 1000 ) int exitCode = proc.exitValue() println( ( exitCode == 0 ) ? stdout : "error with exit code ${exitCode}.\nSTDERR: ${stderr}" ) ``` [or](https://stackoverflow.com/a/159270/2940319) ```groovy def stdout = new StringBuilder(), stderr = new StringBuilder() def proc = 'ls /tmp/NoFile'.execute() proc.consumeProcesstdoutput( stdout, stderr ) proc.waitForOrKill(1000) println( stdout ? "out> \n${stdout}" : '' + stderr ? "err> \n${stderr}" : '' ) ``` #### Show output during the process {% hint style="info" %} > using `System.out` and `System.err` > {% endhint %} ```groovy def proc = "ls /tmp/NoFile".execute() proc.waitForProcessOutput( System.out, System.err ) proc.waitForOrKill(1000) int exitCode = proc.exitValue() if ( exitCode != 0 ) { println "error with exit code ${exitCode}." } ``` #### [with environment](https://stackoverflow.com/a/159270/2940319) ```groovy def envVars = ["GROOVY_HOME=/fake/path/groovy-3.0.7", "CLASSPATH=.:/fake/path/groovy-3.0.7/lib"] def proc = './run.sh'.execute( envVars, new File(".") ) proc.waitForProcessOutput( System.out, System.err ) int exitCode = proc.exitValue() println( (exitCode != 0) ? "exit with ${exitCode}" : '' ) ``` * `run.sh` ```bash env echo ${GROOVY_HOME} ``` * result![execute with environemnt](https://4276369325-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FpuTw6o3ALq0J3Uf7ELc7%2Fuploads%2Fgit-blob-548fcfbc99d8b9499d428a99c8c8f679abea54af%2FexecuteWithEnv.png?alt=media) **with system environment** ```groovy List envVars = System.getenv().collect { k, v -> "${k}=${v}" } def proc = "./run.sh".execute( envVars, new File(".") ) proc.waitForProcessOutput( System.out, System.err ) int exitCode = proc.exitValue() println( (exitCode != 0) ? "exit with ${exitCode}" : '' ) ``` [**with partular path**](https://gist.github.com/katta/5465317) > reference: > > * [groovy execute shell with environment and working dir](https://gist.github.com/katta/5465317#gistcomment-3717156) ```groovy def command = "git log -1" def proc = command.execute( null, new File('/path/to/folder') ) proc.waitFor() println """ ${proc.err.text ?: ''} ${proc.in.text ?: ''} Process exit code: ${proc.exitValue()} """ ``` ### groovyConsole #### environment > \[!NOTE] > > * [`System.setProperty("file.encoding","UTF-8")`](https://stackoverflow.com/a/14987992/2940319) > * [font setup for groovyConsole](https://stackoverflow.com/a/7435514/2940319) > * [Groovy console](https://docs.microfocus.com/OMi/10.62/Content/OMi/ExtGuide/Groovy/GroovyConsole.htm) ```batch > setx JAVA_OPT '-Dfile.encoding=UTF-8 -Dsun.jnu.encoding=UTF-8' > setx GROOVY_OPT '-Dfile.encoding=UTF-8' > setx JAVA_TOOL_OPTIONS '-Dfile.encoding=UTF-8' ``` #### get console details * [charset](https://stackoverflow.com/a/31644153/2940319) ```groovy import java.nio.charset.Charset System.out.println( String.format("file.encoding: %s", System.getProperty("file.encoding")) ); System.out.println( String.format("defaultCharset: %s", Charset.defaultCharset().name()) ); ``` * result ``` file.encoding: UTF-8 defaultCharset: UTF-8 ``` #### font > \[!NOTE|label:references:] > > * [GROOVY-6303: Add ability to use a different font for the input/output area of Groovy Console](https://issues.apache.org/jira/browse/GROOVY-6303) > * windows : add `font/Name` into `HKEY_CURRENT_USER\SOFTWARE\JavaSoft\Prefs\groovy\console\ui` > > ```batch > > REG ADD "HKCU\SOFTWARE\JavaSoft\Prefs\groovy\console\ui" /v "font/Name" /t REG_SZ /d "Monaco" /f > ``` > * linux : add `fontName` into `~/.java/.userPrefs/groovy/ui/prefs.xml` > * macox : add `fontName` into `~/Library/Preferences/com.apple.java.JavaPreferences.plist` > * [Groovy Goodness: Customize Groovy Console Visual Output](https://blog.mrhaki.com/2011/10/groovy-goodness-customize-groovy.html) * check font ```groovy javax.swing.UIManager.getLookAndFeelDefaults() // or javax.swing.UIManager.getLookAndFeelDefaults().each { println "... ${it.key} : ${it.value}" } ``` * [or](https://stackoverflow.com/a/18259107/2940319) ```groovy import java.awt.Font for (Map.Entry entry : javax.swing.UIManager.getDefaults().entrySet()) { Object key = entry.getKey(); Object value = javax.swing.UIManager.get(key); if (value != null && value instanceof javax.swing.plaf.FontUIResource) { println ".. ${key} : ${value}" } } ``` ```groovy .. FormattedTextField.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. MenuItem.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. InternalFrame.titleFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. RadioButton.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. RadioButton.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. OptionPane.buttonFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ToolTip.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. FormattedTextField.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Panel.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. RadioButtonMenuItem.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. OptionPane.messageFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. PopupMenu.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. CheckBoxMenuItem.acceleratorFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. MenuItem.acceleratorFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. CheckBoxMenuItem.acceleratorFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. RadioButtonMenuItem.acceleratorFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. RadioButtonMenuItem.acceleratorFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TabbedPane.smallFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Panel.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. OptionPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. EditorPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Label.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ComboBox.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Button.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. MenuBar.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Tree.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Tree.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ToolBar.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Button.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ComboBox.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Label.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. EditorPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Menu.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TextArea.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TextField.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Spinner.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. CheckBoxMenuItem.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Spinner.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TextField.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. IconButton.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. InternalFrame.titleFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. OptionPane.messageFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Menu.acceleratorFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Menu.acceleratorFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ToolBar.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TitledBorder.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Menu.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. FileChooser.listFont : javax.swing.plaf.FontUIResource[family=Segoe UI,name=Segoe UI,style=plain,size=12] .. ToolTip.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TitledBorder.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. OptionPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. MenuBar.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TextArea.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. OptionPane.buttonFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. CheckBoxMenuItem.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. InternalFrame.optionDialogTitleFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. InternalFrame.paletteTitleFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Table.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. CheckBox.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. List.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ToggleButton.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ScrollPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ScrollPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ToggleButton.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. List.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ColorChooser.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. CheckBox.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ColorChooser.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Table.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. MenuItem.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TableHeader.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TextPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Viewport.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ProgressBar.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. PasswordField.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TabbedPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Slider.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Slider.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TabbedPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. RadioButtonMenuItem.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. PasswordField.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. ProgressBar.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TableHeader.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. TextPane.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. MenuItem.acceleratorFont : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. Viewport.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] .. PopupMenu.font : javax.swing.plaf.FontUIResource[family=Dialog,name=Monaco,style=plain,size=14] ``` * modify font ```groovy import javax.swing.plaf.FontUIResource import javax.swing.UIManager import java.awt.Font UIManager.put("Panel.font", new FontUIResource(new Font ("Monaco", Font.PLAIN, 16))); ``` * [other options](https://stackoverflow.com/a/50126292/2940319) > \[!NOTE|label:references:] > > * [Swing UIManager Keys](https://thebadprogrammer.com/swing-uimanager-keys/) ```groovy private void setFont(FontUIResource myFont) { UIManager.put("CheckBoxMenuItem.acceleratorFont", myFont); UIManager.put("Button.font", myFont); UIManager.put("ToggleButton.font", myFont); UIManager.put("RadioButton.font", myFont); UIManager.put("CheckBox.font", myFont); UIManager.put("ColorChooser.font", myFont); UIManager.put("ComboBox.font", myFont); UIManager.put("Label.font", myFont); UIManager.put("List.font", myFont); UIManager.put("MenuBar.font", myFont); UIManager.put("Menu.acceleratorFont", myFont); UIManager.put("RadioButtonMenuItem.acceleratorFont", myFont); UIManager.put("MenuItem.acceleratorFont", myFont); UIManager.put("MenuItem.font", myFont); UIManager.put("RadioButtonMenuItem.font", myFont); UIManager.put("CheckBoxMenuItem.font", myFont); UIManager.put("OptionPane.buttonFont", myFont); UIManager.put("OptionPane.messageFont", myFont); UIManager.put("Menu.font", myFont); UIManager.put("PopupMenu.font", myFont); UIManager.put("OptionPane.font", myFont); UIManager.put("Panel.font", myFont); UIManager.put("ProgressBar.font", myFont); UIManager.put("ScrollPane.font", myFont); UIManager.put("Viewport.font", myFont); UIManager.put("TabbedPane.font", myFont); UIManager.put("Slider.font", myFont); UIManager.put("Table.font", myFont); UIManager.put("TableHeader.font", myFont); UIManager.put("TextField.font", myFont); UIManager.put("Spinner.font", myFont); UIManager.put("PasswordField.font", myFont); UIManager.put("TextArea.font", myFont); UIManager.put("TextPane.font", myFont); UIManager.put("EditorPane.font", myFont); UIManager.put("TabbedPane.smallFont", myFont); UIManager.put("TitledBorder.font", myFont); UIManager.put("ToolBar.font", myFont); UIManager.put("ToolTip.font", myFont); UIManager.put("Tree.font", myFont); UIManager.put("FormattedTextField.font", myFont); UIManager.put("IconButton.font", myFont); UIManager.put("InternalFrame.optionDialogTitleFont", myFont); UIManager.put("InternalFrame.paletteTitleFont", myFont); UIManager.put("InternalFrame.titleFont", myFont); } setFont(new FontUIResource(new Font("Monaco", Font.PLAIN, 14))); ```