实现对象的排序
class Persion implements Comparable<Persion>{
private String name;
private int age;
public Persion(String name,int age) {
this.name = name;
this.age = age;
}
@Override
public String toString() {
return "姓名:" + this.name + ",年龄:" + this.age;
}
@Override
public int compareTo(Persion o) {
if(this.age > o.age) {
return 1;
}else if(this.age < o.age) {
return -1;
}else {
return 0;
}
}
}
public class Compareable {
public static void main(String args[]) {
Persion per[] =new Persion [] {
new Persion("小李",39),
new Persion("小茗",19),
new Persion("小红",33)
};
Arrays.sort(per);
System.out.println(Arrays.toString(per));
}
}
返回结果:
[姓名:小茗,年龄:19, 姓名:小红,年龄:33, 姓名:小李,年龄:39]
结论以后不管何种情况下,只要是进行对象数组的排序都要实现Comparable<>接口
class Persion implements Comparable<Persion>{
private String name;
private int age;
public Persion(String name,int age) {
this.name = name;
this.age = age;
}
@Override
public String toString() {
return "姓名:" + this.name + ",年龄:" + this.age;
}
@Override
public int compareTo(Persion o) {
if(this.age > o.age) {
return 1;
}else if(this.age < o.age) {
return -1;
}else {
return 0;
}
}
}
public class Compareable {
public static void main(String args[]) {
Persion per[] =new Persion [] {
new Persion("小李",39),
new Persion("小茗",19),
new Persion("小红",33)
};
Arrays.sort(per);
System.out.println(Arrays.toString(per));
}
}
返回结果:
[姓名:小茗,年龄:19, 姓名:小红,年龄:33, 姓名:小李,年龄:39]
结论以后不管何种情况下,只要是进行对象数组的排序都要实现Comparable<>接口