我设计了JApplet类manually
,我使用Netbean Builder
设计了主类,它默认自动生成代码,类将扩展JFrame。那么如何从JFrame运行JApplet类呢
这个JApplet代码
the problem now is buttons does not appear
的更新
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import javax.swing.ImageIcon;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class GalaxyTable2 extends JFrame{ //JApplet
private static final int PREF_W = 700;
private static final int PREF_H = 600;
String[] columnNames
= {"Phone Name", "Brief Description", "Picture", "price",
"Buy"};
// Create image icons
ImageIcon Image1 = new ImageIcon(
getClass().getResource("s1.png"));
ImageIcon Image2 = new ImageIcon(
getClass().getResource("s2.png"));
ImageIcon Image3 = new ImageIcon(
getClass().getResource("s3.png"));
ImageIcon Image4 = new ImageIcon(
getClass().getResource("s4.png"));
ImageIcon Image5 = new ImageIcon(
getClass().getResource("note.png"));
ImageIcon Image6 = new ImageIcon(
getClass().getResource("note2.png"));
ImageIcon Image7 = new ImageIcon(
getClass().getResource("note3.png"));
Object[][] rowData = {
{"Galaxy S", "3G Support,CPU 1GHz",
Image1, 120, false},
{"Galaxy S II", "3G Support,CPU 1.2GHz",
Image2, 170, false},
{"Galaxy S III", "3G Support,CPU 1.4GHz",
Image3, 205, false},
{"Galaxy S4", "4G Support,CPU 1.6GHz",
Image4, 230, false},
{"Galaxy Note", "4G Support,CPU 1.4GHz",
Image5, 190, false},
{"Galaxy Note2 II", "4G Support,CPU 1.6GHz",
Image6, 190, false},
{"Galaxy Note 3", "4G Support,CPU 2.3GHz",
Image7, 260, false},};
MyTable ss = new MyTable(
rowData, columnNames);
// Create a table
JTable jTable1 = new JTable(ss);
public GalaxyTable2() {
jTable1.setRowHeight(70);
add(new JScrollPane(jTable1),
BorderLayout.CENTER);
JFrame f = new JFrame();
this.setTitle("Galaxy Phones");
JButton button = new JButton("Home");
button.setSize(new Dimension(200, 500));
button.setLocation(400, 500);
f.getContentPane().add(button);
JButton button2 = new JButton("Confirm");
button2.setSize(new Dimension(100, 500));
button2.setLocation(100, 300);
// button2.addActionListener(null);
f.getContentPane().add(button2);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(800, 700);
this.setLocation(300, 0);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(PREF_W, PREF_H);
}
public void actionPerformed(ActionEvent e) {
new AMainFrame7().setVisible(true);
}
public static void main(String[] args) {
GalaxyTable2 b=new GalaxyTable2();
/*
JFrame f = new JFrame();
JButton button = new JButton("Home");
button.setSize(new Dimension(100, 50));
button.setLocation(400, 500);
f.getContentPane().add(button);
JButton button2 = new JButton("Confirm");
button2.setSize(new Dimension(100, 50));
button2.setLocation(200, 500);
button2.addActionListener(null);
f.getContentPane().add(button2);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setTitle("Galaxy Phones");
f.setSize(500, 500);
f.getContentPane().add(f, button2);
applet.init();
applet.start();*/
b.pack();
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
b.setLocation((d.width - b.getSize().width) / 2,
(d.height - b.getSize().height) / 2);
b.setVisible(true);
}
}
此主要类中的操作代码
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
new GalaxyTable().setVisible(true);
dispose();
}
答案 0 :(得分:3)
首先,Applet被设计为在浏览器(或applet viewer)的上下文中运行,它们实际上并不是设计用于添加到其他容器中。
从技术上讲,你可以像任何其他组件一样将applet添加到框架中,但就个人而言,我不会。 applet希望能够获得更多信息,以便它能够完全运行。
相反,我会将所有“应用程序”内容移动到一个单独的组件,例如JPanel
,只需根据需要在applet或框架之间移动...
ps-您可以使用f.setLocationRelativeTo(null)
将窗口置于屏幕中央;)
<强>更新强>
你需要回归基础。除非你绝对必须拥有一个,否则在你理解Swing的基础知识之前要避免使用applet,例如......
在你正在做的GalzyTable2
的构造函数中......
JApplet app = new JApplet();
add(app);
app.init();
app.start();
...为什么要向applet添加另一个applet?
例证......
在main
方法中,您尝试将JFrame
的实例添加到自身......
f.getContentPane().add(f, button2);
相反,创建一个类似JPanel
之类的类,根据需要使用复合组件将UI逻辑添加到此。
然后,将此面板添加到您需要的任何顶级容器中。
花点时间阅读Creating a GUI with Swing
更新了示例
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class GalaxyTable2 extends JPanel {
private static final int PREF_W = 700;
private static final int PREF_H = 600;
String[] columnNames
= {"Phone Name", "Brief Description", "Picture", "price",
"Buy"};
// Create image icons
ImageIcon Image1 = new ImageIcon(
getClass().getResource("s1.png"));
ImageIcon Image2 = new ImageIcon(
getClass().getResource("s2.png"));
ImageIcon Image3 = new ImageIcon(
getClass().getResource("s3.png"));
ImageIcon Image4 = new ImageIcon(
getClass().getResource("s4.png"));
ImageIcon Image5 = new ImageIcon(
getClass().getResource("note.png"));
ImageIcon Image6 = new ImageIcon(
getClass().getResource("note2.png"));
ImageIcon Image7 = new ImageIcon(
getClass().getResource("note3.png"));
Object[][] rowData = {
{"Galaxy S", "3G Support,CPU 1GHz",
Image1, 120, false},
{"Galaxy S II", "3G Support,CPU 1.2GHz",
Image2, 170, false},
{"Galaxy S III", "3G Support,CPU 1.4GHz",
Image3, 205, false},
{"Galaxy S4", "4G Support,CPU 1.6GHz",
Image4, 230, false},
{"Galaxy Note", "4G Support,CPU 1.4GHz",
Image5, 190, false},
{"Galaxy Note2 II", "4G Support,CPU 1.6GHz",
Image6, 190, false},
{"Galaxy Note 3", "4G Support,CPU 2.3GHz",
Image7, 260, false},};
MyTable ss = new MyTable(
rowData, columnNames);
// Create a table
JTable jTable1 = new JTable(ss);
public GalaxyTable2() {
jTable1.setRowHeight(70);
add(new JScrollPane(jTable1),
BorderLayout.CENTER);
JPanel buttons = new JPanel();
JButton button = new JButton("Home");
buttons.add(button);
JButton button2 = new JButton("Confirm");
buttons.add(button2);
add(buttons, BorderLayout.SOUTH);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(PREF_W, PREF_H);
}
public void actionPerformed(ActionEvent e) {
new AMainFrame7().setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new GalaxyTable2());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
您似乎对如何使用布局管理器缺乏了解。
花点时间阅读Creating a GUI with Swing和Laying components out in a container