this可能是几乎所有有一点面向对象思想的语言都会引用到的变量，java自然不例外。只是，this有多少种用法，我也不知道了，让我们来see see。
由简入奢！ 易。来个例子说明下：
public class DebugerTest { public static void main(String[] args) { UserExample samp1 = new UserExample("amy"); System.out.println("who are u? "); System.out.println(samp1.whoAreU()); System.out.println("intro yourself?"); System.out.println(samp1.introYourself()); } } class UserExample { private String name; private Integer age; private MyDoll myDoll; public UserExample() { this(null); } // 3. 调用本类的其他构造方法 public UserExample(String name) { this(name, -1); } public UserExample(String name, Integer age) { this.name = name; this.age = age; this.myDoll = new MyDoll("prize"); } // 2. 调用本类属性 public void changeMyName(String name) { this.name = name; } public void changeMyAge(Integer age) { this.age = age; } public String whoAreU() { return "I am " + name + ". "; } public String haoOldAreU() { return "i am " + age + " old."; } // 1. 调用本类方法 public String introYourself() { return this.whoAreU() + this.haoOldAreU() + "\r\n whoAmI@ " + this.myDoll.whoAmI() + "\r\n whoAreSuper@ " + this.myDoll.whoAreSuper(); } class MyDoll { private String name; public MyDoll(String name) { this.name = name; } public void changeMyName(String name) { this.name = name; } // 5. 隐藏式的调用 public String whoAmI() { return whoAreU(); } public String whoAreU() { return "I am a Doll, my name is " + name + ". "; } // 4. 调用父类的或指定的其他的类的同名方法 public String whoAreSuper() { return "super is " + UserExample.this.whoAreU() + ". "; } } }