获取两个List中重复或不同的元素---removeAll()和addAll()的使用

package com.paic.dto;

public class Student {
private Integer id;
private String name;
private String sex;
private String other;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getOther() {
return other;
}
public void setOther(String other) {
this.other = other;
}

@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result + ((other == null) ? 0 : other.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Student other = (Student) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
if (this.other == null) {
if (other.other != null)
return false;
} else if (!this.other.equals(other.other))
return false;
return true;
}
@Override
public String toString() {
return "Student [id=" + id + ", name=" + name + ", sex=" + sex
+ ", other=" + other + "]";
}

}

package com.paic.first_maven;

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

import com.paic.dto.Student;

/**
* Hello world!
*
*/
public class App
{
public static void main( String[] args )
{
//        System.out.println( "Hello World!" );
//    	List<Integer> list = new ArrayList<Integer>();
//    	List<Integer> list1 = new ArrayList<Integer>();
//    	list.add(1);
//    	list.add(2);
//    	list.add(3);
//    	list.add(4);
//    	list1.addAll(list);
//    	list1.add(5);
////    	list1.removeAll(list);//list1=[5] list=[1,2,3,4]
//    	list.removeAll(list1);//list=[] list1=[1,2,3,4,5]
//    	System.out.println(list1+"\n"+list);
List<Student> stu1 = new ArrayList<Student>();
List<Student> stu2 = new ArrayList<Student>();
Student s0 = new Student();
s0.setId(0);
s0.setName("张三0");
s0.setOther("aa0");
s0.setSex("男0");
stu1.add(s0);
Student s1 = new Student();
s1.setId(1);
s1.setName("张三1");
s1.setOther("aa1");
s1.setSex("男1");
stu1.add(s1);
Student s2 = new Student();
s2.setId(2);
s2.setName("张三2");
s2.setOther("aa2");
s2.setSex("男2");
stu1.add(s2);
Student s3 = new Student();
s3.setId(3);
s3.setName("张三3");
s3.setOther("aa3");
s3.setSex("男3");
stu1.add(s3);

Student s31 = new Student();
s31.setId(3);
s31.setName("张三3");
s31.setOther("aa31");
s31.setSex("男3");
stu2.add(s1);
stu2.add(s2);
stu2.add(s31);
Student s4 = new Student();
s4.setId(4);
s4.setName("张三4");
s4.setOther("aa4");
s4.setSex("男4");
stu2.add(s4);
stu2.removeAll(stu1);//list1=[5] list=[1,2,3,4]
//    	list.removeAll(list1);//list=[] list1=[1,2,3,4,5]
System.out.println(stu1+"\n"+stu2);
//输出结果如下：
//    	stu1=[Student [id=0, name=张三0, sex=男0, other=aa0], Student [id=1, name=张三1, sex=男1, other=aa1], Student [id=2, name=张三2, sex=男2, other=aa2], Student [id=3, name=张三3, sex=男3, other=aa3]]
//    	stu2=[Student [id=3, name=张三3, sex=男3, other=aa31], Student [id=4, name=张三4, sex=男4, other=aa4]]
}
}