java中list集合去除重复对象的实现

publicclassStudent {

publicString id;

publicString name;

publicStudent() {

}

publicStudent(String id,String name) {

this.id = id;

this.name = name;

}

publicString getId() {

returnid;

}

publicvoidsetId(String id) {

this.id = id;

}

publicString getName() {

returnname;

}

publicvoidsetName(String name) {

this.name = name;

}

@Override

publicbooleanequals(Object obj) {

Student s=(Student)obj;

returnid.equals(s.id) && name.equals(s.name);

}

@Override

publicinthashCode() {

String in = id + name;

returnin.hashCode();

}

}

importjava.util.ArrayList;

importjava.util.HashSet;

importjava.util.List;

importjava.util.Set;

publicclassQuSame {

 publicstaticvoidmain(String[] args) {

 Liststu =newArrayList();

 stu.add(newStudent("1","yi"));

 stu.add(newStudent("3","san"));

 stu.add(newStudent("3","san"));

 stu.add(newStudent("2","er"));

 stu.add(newStudent("2","er"));

 //set集合保存的是引用不同地址的对象

 Setts =newHashSet();

 ts.addAll(stu);

 for(Student student : ts) {

  System.out.println(student.getId()+"-"+student.getName());

 }

 }

}