Question

How to use parseUnsignedInt() to get int from a string in Java

Answer 1

package javaapplication1;

import java.io.IOException;

public class JavaApplication1 {

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

        String s = "100";
        
        int n = Integer.parseUnsignedInt(s);
        
        System.out.println(n);
        System.out.println(++n);
        System.out.println(n + 12);
    }
}


/*
                   
run:

100
101
113
          
 */

 

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Answer 2

package javaapplication1;

import java.io.IOException;

public class JavaApplication1 {

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

        String s = "-1";
        
        int n = Integer.parseUnsignedInt(s);
        
        System.out.println(n);
        System.out.println(++n);
        System.out.println(n + 12);
    }
}


/*
                   
run:

Exception in thread "main" java.lang.NumberFormatException: Illegal leading minus sign on unsigned string -1.
	at java.lang.Integer.parseUnsignedInt(Integer.java:672)
	at java.lang.Integer.parseUnsignedInt(Integer.java:711)
        ...
          
 */

 

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