Example code assertion

Demo 1:
public class Aser1 {
    
    public static void main(String arg[])
    {
    int x=10;
    assert (x==10); // valid
    System.out.println(x); 
    }
}

For Run

java -ea Ase1
output:  10

If  we write like this  assert (x>10); 
java -ea Ase1
output: 
Assertion error

Demo 2:
public class Aser2 {
    
    public static void main(String  sr[])
    {
    int x=10;
    assert(x>10):m1();
    System.out.println(x);
    }
    public static int m1()
    {
     return 1000;
    }
}

For Run

java -ea Aser2
output:
Assertion error:1000