list实例应用

Java代码如下：

package Test01;

import java.util.ArrayList;
import java.util.List;

public class Test02 {
	
	public static void main(String[] args){
		a();
		b();
		c();
	}
	
	@SuppressWarnings("unchecked")
	public static void a(){
		@SuppressWarnings("rawtypes")
		List list = new ArrayList();
		int sum = 0;
		for (int i = 0; i < 10; i++) {
			sum = sum+i;
		}
		System.out.println(sum);
		list.add(sum);
		System.out.println(list);
	}
	
	@SuppressWarnings("unchecked")
	public static void b(){
		@SuppressWarnings("rawtypes")
		List list = new ArrayList();
		for (int i = 0; i < 10; i++) {
			list.add(i);
		}
		System.out.println(list);
	}
	
	@SuppressWarnings("unchecked")
	public static void c(){
		@SuppressWarnings("rawtypes")
		List list = new ArrayList();
		for (int i = 10; i > 0; i--) {
			list.add(i);
		}
		System.out.println(list);
	}
}

 

运行结果如下：