摘要：
一个小测试，MessagePanel继承于Panel,显示结果为： 1 import java.awt.*; 2 3 import javax.swing.*; 4 5 public class hello extends JFrame{ 6 public hello(){ 7 MessagePanel mp1=new MessagePanel("Welcome to Java"); 8 MessagePanel mp2=new MessagePanel("Java is fun"); 9 MessagePanel ... 阅读全文
