Question

How to add N zeros to an empty string in Java

Answer 1

public class Program {
    public static String addToEmptyStr(String pad, int len) {
        String str = ""; 
        
        while (str.length() < len) {
            str += pad;
        }
        
        return str;
    }

    public static void main(String[] args) {
        int n = 4;

        String empty_string = addToEmptyStr("0", n);
        
        System.out.println(empty_string);
    }
}



/*
run

0000

*/

 

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Answer 2

import java.util.Arrays;

public class Program {
    public static String addToEmptyStr(String pad, int len) {
        char[] zeros = new char[len];
        Arrays.fill(zeros, '0');
        
        String emptyString = new String(zeros);
         
        return emptyString;
    }
 
    public static void main(String[] args) {
        int n = 4;
 
        String empty_string = addToEmptyStr("0", n);
         
        System.out.println(empty_string);
    }
}
 
 
 
/*
run
 
0000
 
*/

 

70+ SQL courses for beginners and professionals