Question

How to use unary operators in Java

Answer 1

package javaapplication1;
 
public class Example {
    public static void main(String[] args) 
    {
	    int n = +1;
	    System.out.println("1. n = 1 = " + n);
		
	    n = -1;
	    System.out.println("2. n = -1 = " + n);
		
	    n = 1;
        System.out.println("3. n = 1 ++n = " + ++n);
        System.out.println("4. n = " + n);
		
	    n = 1;
        System.out.println("5. n = 1 n++ = " + n++);
        System.out.println("6. n = " + n);
		
	    n = 1;
        System.out.println("7. n = 1 --n = " + --n);
        System.out.println("8. n = " + n);
		
	    n = 1;
        System.out.println("9. n = 1 n-- = " + n--);
        System.out.println("10. n = " + n);
		
	    System.out.println("!true = " + !true);
        System.out.println("!false = " + !false);
    }
}
 
/*
run:
 
1. n = 1 = 1
2. n = -1 = -1
3. n = 1 ++n = 2
4. n = 2
5. n = 1 n++ = 1
6. n = 2
7. n = 1 --n = 0
8. n = 0
9. n = 1 n-- = 1
10. n = 0
!true = false
!false = true
 
*/

 

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