gistfile1.txt

public class Test{
  public static void main(String[] args){
    //System.out.println(null);
    //System.out.println(null > 10);
    //System.out.println(null < 10);
    System.out.println(null == null);
    System.out.println(10 == 10);
    }
  }
 
$ javac Test.java
$ java Test
true
true
 
 
public class Test{
  public static void main(String[] args){
    //System.out.println(null);
    System.out.println(null > 10);
    System.out.println(null < 10);
    System.out.println(null == null);
    System.out.println(10 == 10);
    }
  }
 
$ javac Test.java
Test.java:4: operator > cannot be applied to <nulltype>,int
    System.out.println(null > 10);
     ^
Test.java:5: operator < cannot be applied to <nulltype>,int
    System.out.println(null < 10);
     ^
2 errors


public class Test{
	public static void main(String[] args){
		//System.out.println(null);
		//System.out.println(null > 10);
		//System.out.println(null < 10);
		System.out.println(null == 10);
		System.out.println(null == null);
		System.out.println(10 == 10);
		}
	}

Test.java:6: incomparable types: <nulltype> and int
		System.out.println(null == 10);
		                        ^
1 error