Question

How to use compareToIgnoreCase() to compare two String and ignore case in Java

Answer 1

package javaapplication1;

import java.io.IOException;

public class JavaApplication1 {

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

        try {

            String s1 = "java";
            String s2 = "JAVA";

            int rv = s1.compareToIgnoreCase(s2);
            System.out.println("java compareToIgnoreCase JAVA : " + rv); 
            
            rv = s2.compareToIgnoreCase(s1);
            System.out.println("JAVA compareToIgnoreCase java : " + rv); 
            
            rv = s1.compareToIgnoreCase(s1);
            System.out.println("java compareToIgnoreCase java : " + rv); 
            
            rv = "abc".compareToIgnoreCase("abC");
            System.out.println("abc compareToIgnoreCase abC : " + rv); 

        } catch (Exception e) {
            System.out.print(e.toString());
        }
    }
}

/*
           
run:
     
java compareToIgnoreCase JAVA : 0
JAVA compareToIgnoreCase java : 0
java compareToIgnoreCase java : 0
abc compareToIgnoreCase abC : 0
  
 */

 

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