在Java中如何使用this关键字引用对象_OOP对象引用操作指南

public class Person {
    private String name;

    public void setName(String name) {
        this.name = name; // this.name 指成员变量，name 指参数
    }

    public String getName() {
        return this.name;
    }
}

public class Person {
    private String name;
    private int age;

    public Person() {
        this("Unknown", 0); // 调用带两个参数的构造方法
    }

    public Person(String name) {
        this(name, 0); // 调用带两个参数的构造方法
    }

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

public class Button {
    public void click() {
        EventManager.register(this); // 把当前按钮对象注册到事件管理器
    }
}

public class StringBuilderExample {
    private StringBuilder sb = new StringBuilder();

    public StringBuilderExample append(String str) {
        sb.append(str);
        return this; // 返回当前对象，支持链式调用
    }

    public StringBuilderExample clear() {
        sb.setLength(0);
        return this;
    }

    public String toString() {
        return sb.toString();
    }
}

new StringBuilderExample()
    .append("Hello")
    .append(" ")
    .append("World")
    .toString();