package com.test.forname;
public class TestForName {
public static void main(String[] args) throws Exception{
/* A a = (A) Class.forName("com.test.a.A").newInstance();
Class<?> c = Class.forName("com.test.c.C");
System.out.println(a.getClass());
System.out.println(c.getClasses());
System.out.println(c.getClassLoader());*/
int j = 0;
for(int i=0;i<100;i++){
j = j++;
}
System.out.print(j);
}
运行结果：0
package com.test.forname;
import com.test.a.A;
import com.test.c.C;
public class TestForName {
public static void main(String[] args) throws Exception{
/* A a = (A) Class.forName("com.test.a.A").newInstance();
Class<?> c = Class.forName("com.test.c.C");
System.out.println(a.getClass());
System.out.println(c.getClasses());
System.out.println(c.getClassLoader());*/
int j = 0;
j = j++ Java用了中间缓存变量的机制，等同于
temp = j;
j = j + 1;
j = temp;
for(int i=0;i<100;i++){
j = ++j;
}
System.out.println(j);
}
}
输出结果：100
int j = 0,k = 0;
for(int i=0;i<3;i++){
j = j++;
k = j++ + ++j;
if(i == 2){
System.out.println("j-"+j++);
}
}
System.out.println("j---"+j);
System.out.println("k---"+k);
}
输出结果：
j-6
j---7
k---10