Java Basics (i) Self-increment, decrement operator

Increment operator + +, increase the value by 1, the decrement operator---to reduce the value by 1

Operator	Code Snippets	Difference
++	x = 2 * m + +;	First Run x = 2 * m; Re-run m = m + 1;
++	x = 2 * ++m	First run m = m + 1; Run x = 2 * m again;
--	y = 2 * m--	Run y = 2 * m first; Re-run m = m-1;
--	y = 2 *--m	First run m = m-1; Run y = 2 * m again;

Self-increment code:

Package Com.scd.chapter1;public class Test {    /**     * @param args     *    /public static void main (string[] args) {        //TODO auto-generated method stub        int m = 7;        int n = 7;        int x = 2 * m++;        int y = 2 * ++n;        System.out.println ("m=" +m);        System.out.println ("n=" +n);        System.out.println ("x=" +x);        System.out.println ("y=" +y);}    

Output Result:

M=8n=8x=14y=16

Self-Reducing code:

Package Com.scd.chapter1;public class Test {    /**     * @param args     *    /public static void main (string[] args) {        //TODO auto-generated method stub        int m = 7;        int n = 7;        int x = 2 * m--;        int y = 2 *--n;        System.out.println ("m=" +m);        System.out.println ("n=" +n);        System.out.println ("x=" +x);        System.out.println ("y=" +y);}    

Output Result:

M=6n=6x=14y=12

　　

　　

Java Basics (i) Self-increment, decrement operator