Java BigInteger negate() method example

public BigInteger negate()

The negate() method returns -this

Requires Java 1.1 and up

Below is a java code demonstrates the use of negate() method of BigInteger class. The example presented might be simple however it shows the behavior of the negate() method.

package com.javatutorialhq.java.examples;

import java.math.BigInteger;
import java.util.Scanner;

/*
 * A java example source code to demonstrate
 * the use of negate() method of BigInteger class
 */

public class BigIntegerNegateExample {

	public static void main(String[] args) {	
		
		// get user input		 
		System.out.print("Enter a value:");
		Scanner s = new Scanner(System.in);
		String input = s.nextLine();
		s.close();
		
		// declare a new BigInteger
		BigInteger val1 = new BigInteger("-1245");
		// convert string input to BigInteger
		BigInteger val2 = new BigInteger(input);
		// get the negative value of both the BigInteger and print it
		System.out.println("Negation of val1="+val1.negate());
		System.out.println("Negation of val2="+val2.negate());				

		
	}

} 

This example is a lot simpler than it looks. Basically we ask for user input and converted this value into BigInteger. Another BigInteger object were also initialize with constructor having a value of “-1245”. We then use the negete() method to get the negative value of both the input.

Below is the sample output when you run the above example.

• Java BigInteger Class Tutorial
• Java Tutorial

• Oracle Java Documentation