Dalek的专栏

解决： 1 System.out.println("Welcome to Java!");中的println是小写L，而不是大写i  2 文件命名和类名不同 修改后编译执行成功：

import java.awt.FlowLayout; import javax.swing.JFrame; import javax.swing.JTextField; //import javax.swing.*; import javax.swing.JLabel; public class ShowFlowLayout extends JFrame { public ShowFl

import java.awt.FlowLayout; import java.awt.GridLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; public class ShowGridLayout extends JFrame{ public Show

import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JFrame; public class ShowBorderLayout extends JFrame { public ShowBorderLayout() { setLayout(new BorderLayout(5, 5

public class TestEdible { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Object [] objects = {new Tiger(), new Chicken(), new Apple()};

import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class HandleEvent extends JFrame { public HandleEvent() { JButton jbOK = new JButton("OK"); JButton jb

import java.awt.GridLayout; import javax.swing.JFrame; public class TestFigurePanel extends JFrame { public TestFigurePanel() { setLayout(new GridLayout(2,3,5,5)); add(new FigurePanel(Figure

import java.awt.BorderLayout; import java.awt.GridLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; public class TestPanels ex