innerclassexam2.java

来自「Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程」· Java 代码 · 共 39 行

package exam2;
class Pen {
  String color;
  int length;
  Pen(String color, int length) {
    this.color = color;
    this.length = length;
  }

  void setColor(String color) {
    this.color = color;
  }

  String getColor() {
    return color;
  }

  void setLength(int length) {
    this.length = length;
  }

  int getLength() {
    return length;
  }

  public class myPen { //声明一个内部类myPen
    void display() {
      System.out.println("the length of My " + color + " Pen is " + length);
    }
  }
}

class InnerClassExam2 {
  public static void main(String args[]) {
    Pen p = new Pen("blue", 20);
    Pen.myPen mp = p.new myPen();
    mp.display();
  }
}