Java: Generate random integers in a specific range

Last update on March 11 2025 11:10:14 (UTC/GMT +8 hours)

Generate Random Integers in Range

Write a Java program to generate random integers in a specific range.

Pictorial Presentation:

Sample Solution:

Java Code:

import java.util.Scanner;
public class Example3  {

      public static void main( String args[] ){ 
	    Scanner sc = new Scanner( System.in ); 
        System.out.print("Input the starting number of the range: "); 
        int rsnum = sc.nextInt(); 
        System.out.print("Input the ending number of the range: "); 
        int renum = sc.nextInt(); 
	    int random_num = rsnum + (int)(Math.random() * ((renum - rsnum) + 1));
	    System.out.println(random_num);
     }  
}

Sample Output:

Input the starting number of the range: 5                                                                     
Input the ending number of the range: 25                                                                      
10 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to generate a set of unique random integers within a given range using a HashSet.
• Write a Java program to generate random integers in a specified range and calculate their average using Java streams.
• Write a Java program to generate random integers with a secure random generator and sort them in descending order.
• Write a Java program to simulate multiple dice rolls by generating random integers and then output statistical measures.

Java Code Editor:

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