实体类写法

public class Person {
private String name;
private int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}

public String getName() {
return name;
}

public int getAge() {
return age;
}

@Override
public boolean equals(Object obj) {
if(this==obj)
return true;
if(obj instanceof Person) {
Person p = (Person) obj;
if(this.name.equals(p.name) && this.age==p.age)
return true;
}
return false;
}

@Override
public int hashCode() {
return this.name.hashCode()*31 + this.age;
}

public String toString() {
return name + "@ " + age;
}


}