在Java中如何使用this和super进行构造方法调用_this super操作技巧

<font face="Courier New,Courier,monospace">public class Person {
    private String name;
    private int age;

    // 无参构造
    public Person() {
        this("未知姓名", 0);  // 调用本类含参构造
    }

    // 含参构造
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
}</font>

<font face="Courier New,Courier,monospace">class Animal {
    protected String species;

    public Animal(String species) {
        this.species = species;
    }
}

class Dog extends Animal {
    private String breed;

    public Dog(String breed) {
        super("犬类");  // 必须调用父类含参构造
        this.breed = breed;
    }
}</font>

<font face="Courier New,Courier,monospace">public class Employee {
    private String name;
    private String department;

    public Employee(String name) {
        this(name, "未分配");  // 使用 this 跳转
    }

    public Employee(String name, String department) {
        this.name = name;
        this.department = department;
    }
}

public class Manager extends Employee {
    private int teamSize;

    public Manager(String name, int teamSize) {
        super(name);  // 先调用父类构造
        this.teamSize = teamSize;
    }
}</font>

<font face="Courier New,Courier,monospace">public Person() {
    this("张三");
}

public Person(String name) {
    this();  // 错误：形成调用循环
}</font>