JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: How to generate random numbers in the given range?


Description:

Incase if we want to generate random number in the given range, then we need to use nextInt(limit) method. Here we need to pass the range limit. For example in the below example we are passing 50 as limit, so that the generated random number is always less than 50.


Code:
package com.java2novice.random;

import java.util.Random;

public class MyRandomInRange {

	public static void main(String a[]){
		Random rnd = new Random();
		System.out.println("Random Integers below 50:");
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
		System.out.println(rnd.nextInt(50));
	}
}

Output:
Random Integers below 50:
28
41
23
28
5
14
3
32
29
12
32
7
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List of Random class sample programs:

  1. Basic random number generator.
  2. How to generate random numbers in the given range?
  3. How to generate same random sequence everytime?
  4. How to change Random class seed value?
  5. How to create random string with random characters?
Knowledge Centre
What is java static import?
By using static imports, we can import the static members from a class rather than the classes from a given package. For example, Thread class has static sleep method, below example gives an idea:

import static java.lang.Thread;
public class MyStaticImportTest {
public static void main(String[] a) {
try{
sleep(100);
} catch(Exception ex){

}
}
}
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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