【自动化__持续集成】___java___List

一、代码如下

package www.wujianbotwo;

import java.util.*;

public class Demo07 {

public static void main(String[] args) {
// TODO Auto-generated method stub
List mylist= new List();

}

}

 

package www.wujianbotwo;

import java.util.*;

public class Demo07 {

public static void main(String[] args) {
// TODO Auto-generated method stub
//List mylist= new List();

String[] names= {"woniuxy", "admin", "qiang"};
Object name= "woniuxy";
Object age= 40;
Object  demo= new Demo07();

Object[] objs= {"name", 50, 123.45, true, demo};

//List mylist= new List();

Demo07 demo07= (Demo07)new Object();

}

}

 

package www.wujianbotwo;

import java.util.*;

public class Demo07 {

public static void main(String[] args) {
// TODO Auto-generated method stub
//List mylist= new List();

String[] names= {"woniuxy", "admin", "qiang"};
Object name= "woniuxy";
Object age= 40;
Object  demo= new Demo07();

Object[] objs= {"name", 50, 123.45, true, demo};

List<Object> mylist= new ArrayList<Object>();

List<String> list= new ArrayList<String>();
//Demo07 demo07= (Demo07)new Object();

list.add("aaa");
list.add("wujianbo");
list.add("wudongmei");
list.add("wujiamin");
for(int i=0; i<list.size(); i++) {
System.out.println(list.get(i));
}

list.remove("wujianbo");//删除字符串数组列表中的元素
for(int i=0; i<list.size(); i++) {
System.out.println(list.get(i));
}

list.remove(0);//删除字符串数组列表中的第1个元素
for(int i=0; i<list.size(); i++) {
System.out.println(list.get(i));
}

list.set(1, "wujianbo");//更改列表数组中的第1个元素
for(int i=0; i<list.size(); i++) {
System.out.println(list.get(i));
}


System.out.println(list.indexOf("wujianbo"));//输出列表数组中wujianbo元素所在数组中的下标

}

}