preincrement or pre-decrement, post-increment or post-decrement : Unary Operators « Operators

preincrement or pre-decrement, post-increment or post-decrement : Unary Operators « Operators « SCJP

1.	Java Source And Data Type
2.	Operators
3.	Modifiers
4.	Type Casting
5.	Statements
6.	Object Oriented
7.	Thread
8.	Utility Classes
9.	File

SCJP » Operators » Unary Operators

2.2.6.preincrement or pre-decrement, post-increment or post-decrement

public class MainClass{

    public static void main(String[] argv){



      int i = 0;

      int y = 0;

      y = i++;

      System.out.println(i);

      System.out.println(y);

    }

}



1

0



public class MainClass{

    public static void main(String[] argv){



      int i = 0;

      int y = 0;

      y = ++i;

      System.out.println(i);

      System.out.println(y);

    }

}

1

1



public class MainClass{

    public static void main(String[] argv){



      int i = 0;

      int y = 0;

      y = i--;

      System.out.println(i);

      System.out.println(y);

    }

}

-1

0





public class MainClass{

    public static void main(String[] argv){



      int i = 0;

      int y = 0;

      y = --i;

      System.out.println(i);

      System.out.println(y);

    }

}

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-1

2.2.Unary Operators
	2.2.1.	Unary operators take only a single operand.
	2.2.2.	The unary operators are used to increment, decrement, or change the sign of a value.
	2.2.3.	Increment and Decrement
	2.2.4.	+ and - operators are applied to a value of byte, char, and short types, the value is converted to an int.
	2.2.5.	The ++ operators may appear before the value (prefix) or after the value (postfix).
	2.2.6.	preincrement or pre-decrement, post-increment or post-decrement
	2.2.7.	mixing the increment and decrement operators with other operators
	2.2.8.	increment or decrement operators on a final variable.

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