Create a file Codechef.java

import java.util.*;
import java.lang.*;
import java.io.*;

class Codechef
{
 public static void main (String[] args) throws java.lang.Exception
 {
  // your code goes here
  System.out.println("Hello Java");

 }
}

• sudo apt install openjdk-17-jdk-headless
• javac codechef.java
  • this will create a Codechef.class file
• java Codechef