Question

How to clear (empty) a StringBuilder in Java

Answer 1

public class MyClass {
    public static void main(String args[]) throws Exception {  
        StringBuilder sb = new StringBuilder("java");
        
        System.out.println(sb);
        System.out.println(sb.length());
        
        sb.setLength(0);  

        System.out.println(sb);
        System.out.println(sb.length()); 
    }
}

 
 
 
 
/*
run:
   
java
4

0
   
*/

 

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