a++和++a

package cn.edu.hpu.example;
public class BoBo {
	/**
	 * @zhj
	 */
	public static void main(String[] args) {
		int a = 0;
		int b = a++;// 先賦值再加1
		System.out.println("a=" + a + ",b=" + b);
		int a1 = 0;
		int c = ++a1;// 先加1再賦值
		System.out.println("a1=" + a1 + ",c=" + c);

		int a2 = 0;
		int d = a2--;// 先賦值再減1
		System.out.println("a2=" + a2 + ",d=" + d);
		int a3 = 0;
		int e = --a3;// 先減1再賦值
		System.out.println("a3=" + a3 + ",e=" + e);
	}
}

結果顯示：

a=1,b=0
a1=1,c=1
a2=-1,d=0
a3=-1,e=-1