this关键字在Java中的作用及使用方法详解

public class Person {
    private String name;

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

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

    public Person(String name) {
        this(name, 0); // 调用下面的构造方法
    }

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

public class StringBuilderExample {
    private String content = "";

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

    public void print() {
        System.out.println(this.content);
    }
}

// 使用：
new StringBuilderExample().append("Hello").append(" World").print();

public class Outer {
    private String value = "outer";

    class Inner {
        private String value = "inner";

        public void show() {
            System.out.println(value);           // 输出 "inner"
            System.out.println(this.value);      // 输出 "inner"
            System.out.println(Outer.this.value); // 输出 "outer"
        }
    }
}