In this tutorial, we will see Java Random nextInt method.It is used to generate random integer.
There are two overloaded versions for Random nextInt method.

nextInt()

Syntax

random.nextInt()

Here random is object of the java.util.Random class.

Return

returns random integer.

Example

Let’s see a very simple example:

package org.arpit.java2blog;

import java.util.Random;

public class RandomNextIntMain {

	public static void main(String[] args) {
		Random random=new Random();
		System.out.println("Random Integer: "+random.nextInt());
		System.out.println("Random Integer: "+random.nextInt());
		System.out.println("Random Integer: "+random.nextInt());
	}
}

Output:

nextInt(int bound)

Syntax

random.nextInt(bound)

Here random is object of the java.util.Random class and bound is integer upto which you want to generate random integer.
Random’s nextInt method will generate integer from 0(inclusive) to bound(exclusive)
If bound is negative then it will throw IllegalArgumentException

Return

returns random integer in range of 0 to bound(exclusive)

Example

Let’s see a very simple example:

package org.arpit.java2blog;

import java.util.Random;

public class RandomNextIntMain {

	public static void main(String[] args) {
		Random random=new Random();
		System.out.println("Generating 10 random integer from range of 0 to 100:");
		for (int i = 0; i 
As bound is exclusive, hence we have use random.nextInt(101) to generate integer from 0 to 100.
Output:

Generating 10 random integer from range of 0 to 100

72

100

98

69

62

90

88

16

16

61

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