java String isblank VS isempty

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/**
 * @author lautturi.com
 * Java example: isblank VS isempty in java
 */

import java.util.*;

import org.apache.commons.lang3.StringUtils;

public class Lautturi {

	public static void main(String[] args) {

		StringUtils.isBlank("");
		StringUtils.isBlank(" ");
		StringUtils.isBlank("  ");
		StringUtils.isBlank("\r");
		StringUtils.isBlank("\n");
		StringUtils.isBlank("\r\n");
		StringUtils.isBlank("\t");
		StringUtils.isBlank("\0");
		StringUtils.isBlank("\\0");
		StringUtils.isBlank("java");
		StringUtils.isBlank(" java ");
		
        System.out.println("isBlank(\"\") => "+StringUtils.isBlank(""));
		System.out.println("isBlank(\" \") => "+StringUtils.isBlank(" "));
		System.out.println("isBlank(\"  \") => "+StringUtils.isBlank("  "));
		System.out.println("isBlank(\"\\r\") => "+StringUtils.isBlank("\r"));
		System.out.println("isBlank(\"\\n\") => "+StringUtils.isBlank("\n"));
		System.out.println("isBlank(\"\\r\\n\") => "+StringUtils.isBlank("\r\n"));
		System.out.println("isBlank(\"\\t\") => "+StringUtils.isBlank("\t"));
		System.out.println("isBlank(\"\\0\") => "+StringUtils.isBlank("\0"));
		System.out.println("isBlank(\"\\\\0\") => "+StringUtils.isBlank("\\0"));
		System.out.println("isBlank(\"java\") => "+StringUtils.isBlank("java"));
		System.out.println("isBlank(\" java \") => "+StringUtils.isBlank(" java "));
        
        
		StringUtils.isEmpty("");
		StringUtils.isEmpty(" ");
		StringUtils.isEmpty("  ");
		StringUtils.isEmpty("\r");
		StringUtils.isEmpty("\n");
		StringUtils.isEmpty("\r\n");
		StringUtils.isEmpty("\t");
		StringUtils.isEmpty("\0");
		StringUtils.isEmpty("\\0");
		StringUtils.isEmpty("java");
		StringUtils.isEmpty(" java ");
		
		System.out.println();
		
		System.out.println("isEmpty(\"\") => "+StringUtils.isEmpty(""));
		System.out.println("isEmpty(\" \") => "+StringUtils.isEmpty(" "));
		System.out.println("isEmpty(\"  \") => "+StringUtils.isEmpty("  "));
		System.out.println("isEmpty(\"\\r\") => "+StringUtils.isEmpty("\r"));
		System.out.println("isEmpty(\"\\n\") => "+StringUtils.isEmpty("\n"));
		System.out.println("isEmpty(\"\\r\\n\") => "+StringUtils.isEmpty("\r\n"));
		System.out.println("isEmpty(\"\\t\") => "+StringUtils.isEmpty("\t"));
		System.out.println("isEmpty(\"\\0\") => "+StringUtils.isEmpty("\0"));
		System.out.println("isEmpty(\"\\\\0\") => "+StringUtils.isEmpty("\\0"));
		System.out.println("isEmpty(\"java\") => "+StringUtils.isEmpty("java"));
		System.out.println("isEmpty(\" java \") => "+StringUtils.isEmpty(" java "));
				 

	}
}

output:

isBlank("") => true
isBlank(" ") => true
isBlank("  ") => true
isBlank("\r") => true
isBlank("\n") => true
isBlank("\r\n") => true
isBlank("\t") => true
isBlank("\0") => false
isBlank("\\0") => false
isBlank("java") => false
isBlank(" java ") => false

isEmpty("") => true
isEmpty(" ") => false
isEmpty("  ") => false
isEmpty("\r") => false
isEmpty("\n") => false
isEmpty("\r\n") => false
isEmpty("\t") => false
isEmpty("\0") => false
isEmpty("\\0") => false
isEmpty("java") => false
isEmpty(" java ") => false