JAVA集合LinkedList

import java.util.*;
public class linkedList {

public static void main(String[] args) {
    //创建一个集合
    LinkedList ll = new LinkedList();
    Emp emp1 = new Emp("1", "qwe", 1.0f);
    Emp emp2 = new Emp("2", "wer", 2.0f);
    //存放数据
    ll.addFirst(emp1);//存放数据时下一个数据永远在当前的数据前面
    ll.addFirst(emp2);
    for (int i = 0; i  < ll.size(); i ++) {
        //取出数据
        Emp tem = (Emp)ll.get(i);
        System.out.println(tem.getName());
    }
}

}
class Emp {
private String empNo;
private String name;
private float sal;
public String getEmpNo() {
return empNo;
}
public void setEmpNo(String empNo) {
this.empNo = empNo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public float getSal() {
return sal;
}
public void setSal(float sal) {
this.sal = sal;
}

public Emp(String empNo, String name, float sal) {
    this.empNo = empNo;
    this.name = name;
    this.sal = sal;
}

}