Java 循环结构（while do...while for循环）

Java 循环结构

• while 循环
  • while是最基本的循环，它的结构为：

while(){
	//循环内容
}

public class ScannerTest {
    public static void main(String[] args) {
        int i=0;
        int b=0;
        while (i<=100){
            b=b+i;
            i++;
        }
        System.out.println(b);
    }
}

• do…while 循环

public class DoWhile{
    public static void main(String[] args) {
        int i=0;
        int b=0;
        do {
            b=b+i;
            i++;
        }while (i<=100);
        System.out.println(b);
    }
}

• for 循环

public class For {
    public static void main(String[] args) {
        int b=0;
        for (int i=0;i<=100;i++){
            b=b+i;
        }
        System.out.println(b);
    }
}

• 增强for循环

public static void testFor() {
 
	List list = new ArrayList();
	list.add(1);
	list.add(2);
	list.add(3);
	for(Object obj : list){
		System.out.println(obj);
		list.remove(obj);
	}
 
}