Javapoet: Define enums

'TypeSpec.enumBuilder' is used to define enums.

 

Example

TypeSpec helloWorldTypeSpec = TypeSpec.enumBuilder("MONTH")
	.addModifiers(Modifier.PUBLIC)
	.addEnumConstant("JANUARY")
	.addEnumConstant("FEBRUARY")
	.addEnumConstant("MARCH")
	.addEnumConstant("APRIL")
	.addEnumConstant("MAY")
	.addEnumConstant("JUNE")
	.addEnumConstant("JULY")
	.addEnumConstant("AUGUST")
	.addEnumConstant("SEPTEMBER")
	.addEnumConstant("OCTOBER")
	.addEnumConstant("NOVEMBER")
	.addEnumConstant("DECEMBER")
	.build();

 

Find the below working application.

 

EnumDemo.java

 

package com.sample.app;

import java.io.IOException;

import javax.lang.model.element.Modifier;

import com.squareup.javapoet.JavaFile;
import com.squareup.javapoet.TypeSpec;

public class EnumDemo {

	public static void main(String args[]) throws IOException {

		TypeSpec helloWorldTypeSpec = TypeSpec.enumBuilder("MONTH")
			    .addModifiers(Modifier.PUBLIC)
			    .addEnumConstant("JANUARY")
			    .addEnumConstant("FEBRUARY")
			    .addEnumConstant("MARCH")
			    .addEnumConstant("APRIL")
			    .addEnumConstant("MAY")
			    .addEnumConstant("JUNE")
			    .addEnumConstant("JULY")
			    .addEnumConstant("AUGUST")
			    .addEnumConstant("SEPTEMBER")
			    .addEnumConstant("OCTOBER")
			    .addEnumConstant("NOVEMBER")
			    .addEnumConstant("DECEMBER")
			    .build();

		String packageName = "com.sample.app";
		JavaFile javaFile = JavaFile.builder(packageName, helloWorldTypeSpec).build();

		javaFile.writeTo(System.out);
	}

}

 

Generated code

package com.sample.app;

public enum MONTH {
  JANUARY,

  FEBRUARY,

  MARCH,

  APRIL,

  MAY,

  JUNE,

  JULY,

  AUGUST,

  SEPTEMBER,

  OCTOBER,

  NOVEMBER,

  DECeMBER
}

 

 

 

 

  

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