我有这个简单的摇滚，剪刀，纸质java类，我似乎无法将其转换为applet。我已经研究了这个主题一个多星期了，我已经尝试了几个教程等等。我似乎错过了一些东西;另外，小程序对我来说是一个全新的概念...
这是我希望转换为applet的TestClass.java的java代码：
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Component;
import java.awt.Container;
public class TestClass extends JFrame implements ActionListener{
public JLabel myLbl_P1 = new JLabel("enter Player 1 Name:");
public JTextField myTxtTemp1 = new JTextField(4);
public JLabel myLbl_P2 = new JLabel("enter Player 2 Name:");
public JTextField myTxtTemp2 = new JTextField(4);
public JButton myBtnPlay=new JButton("Play");
public JLabel myLblResults = new JLabel(" ");
public static void main(String args[]) {
new TestClass();
}
TestClass() {
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel p = new JPanel();
myBtnPlay.addActionListener(this);
p.add(myLbl_P1);
p.add(myTxtTemp1);
p.add(myLbl_P2);
p.add(myTxtTemp2);
p.add(myBtnPlay);
p.add(myLblResults);
p.setLayout(new BoxLayout(p,BoxLayout.Y_AXIS));
p.add(myLbl_P1);
p.add(myTxtTemp1);
p.add(myLbl_P2);
p.add(myTxtTemp2);
p.add(myBtnPlay);
p.add(myLblResults);
this.getContentPane().add (p);
this.setSize(400, 300);
}
//------------------------------------------------
public void actionPerformed(ActionEvent e) {
String winnerName, P1, P2, winnerStr, myStrResult;
winnerName="";
String Pl1=myTxtTemp1.getText();
String Pl2=myTxtTemp2.getText();
int winner;
myStrResult="";
if(Pl1.isEmpty() || Pl2.isEmpty()){
JOptionPane.showMessageDialog(null,"Invalid Player Name","Error",JOptionPane.WARNING_MESSAGE);
}
RPSPlayer player1 = new RPSPlayer(Pl1);
RPSPlayer player2 = new RPSPlayer(Pl2);
RockPaperScissorsGame x = new RockPaperScissorsGame(player1, player2);
String[] result=x.rps(player1, player2);
P1=result[0];
P2=result[1];
winnerStr=result[2];
winner=Integer.valueOf(winnerStr).intValue();
myStrResult=player1.getName()+" chose "+P1+" ";
myStrResult=myStrResult+player2.getName()+" chose "+P2+" ";
if(winner==0){
myStrResult=myStrResult+" It was a Draw!";
}
else{
if(winner==1){
winnerName=player1.getName();
}
if(winner==2){
winnerName=player2.getName();
}
myStrResult=myStrResult+winnerName+" Won!";
}
//System.out.println(myStrResult);
myLblResults.setText(myStrResult);
}
}
我尝试过改变：
public class TestClass extends JFrame implements ActionListener{ ***to***
public class TestClass extends JApplet implements ActionListener{
public static void main(String args[]) { ***to***
void init() {
this.getContentPane().add (p); ***to***
this.add (p);
this.setSize(400, 300); ***to***
//this.setSize(400, 300);
this.setVisible(true); ***to***
//this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); ***to***
//this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
我不确定我是否还需要在开头导入任何其他东西 - 也许是导入java.applet。*; ??? 此外，这是我试图加载代码的html页面 - 我认为这是正确的：
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<applet code=applet.class width="400" height="400">
Your browser does not support the applet tag.
</applet>
</body>
</html>
但是，就像我说我对这个全新，我正在努力...... 如果有人可以帮我看看我需要将原始代码变成applet的确切更改，我将非常感激并为我的学习做很长的准备......
答案 0 :(得分：2)
要核心内容，请将其移至JPanel。如果要在窗口中显示它，请使用JFrame，当您想将其显示为小程序时使用JApplet
这就是为什么它通常不鼓励直接从顶级容器扩展（并将核心逻辑直接放在它们上面）。将您的UI分成面板，这些面板可以添加到您想要的容器中。
您应该将这些顶级容器的管理责任与您的UI的其余部分分开，这样您就可以隔离＆＃34;组件并不试图监控窗户＆＃34;当它们可能不存在时，例如
它增加了它的可重用性并减少了它的耦合。
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class TestPane extends JPanel implements ActionListener {
public JLabel myLbl_P1 = new JLabel("enter Player 1 Name:");
public JTextField myTxtTemp1 = new JTextField(4);
public JLabel myLbl_P2 = new JLabel("enter Player 2 Name:");
public JTextField myTxtTemp2 = new JTextField(4);
public JButton myBtnPlay = new JButton("Play");
public JLabel myLblResults = new JLabel(" ");
TestPane() {
myBtnPlay.addActionListener(this);
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
add(myLbl_P1);
add(myTxtTemp1);
add(myLbl_P2);
add(myTxtTemp2);
add(myBtnPlay);
add(myLblResults);
}
//------------------------------------------------
@Override
public void actionPerformed(ActionEvent e) {
String winnerName;
String P1;
String P2;
String winnerStr;
String myStrResult;
winnerName = "";
String Pl1 = myTxtTemp1.getText();
String Pl2 = myTxtTemp2.getText();
int winner;
myStrResult = "";
if (Pl1.isEmpty() || Pl2.isEmpty()) {
JOptionPane.showMessageDialog(null, "Invalid Player Name", "Error", JOptionPane.WARNING_MESSAGE);
}
RPSPlayer player1 = new RPSPlayer(Pl1);
RPSPlayer player2 = new RPSPlayer(Pl2);
RockPaperScissorsGame x = new RockPaperScissorsGame(player1, player2);
String[] result = x.rps(player1, player2);
P1 = result[0];
P2 = result[1];
winnerStr = result[2];
winner = Integer.valueOf(winnerStr).intValue();
myStrResult = player1.getName() + " chose " + P1 + " ";
myStrResult = myStrResult + player2.getName() + " chose " + P2 + " ";
if (winner == 0) {
myStrResult = myStrResult + " It was a Draw!";
} else {
if (winner == 1) {
winnerName = player1.getName();
}
if (winner == 2) {
winnerName = player2.getName();
}
myStrResult = myStrResult + winnerName + " Won!";
}
//System.out.println(myStrResult);
myLblResults.setText(myStrResult);
}
}
import javax.swing.JApplet;
public class TestApplet extends JApplet {
private TestPane testPane;
@Override
public void init() {
testPane = new TestPane();
add(testPane);
}
}
这是（自动生成的）HTML文件，用于在applet查看器中显示TestApplet
<HTML>
<HEAD>
<TITLE>Applet HTML Page</TITLE>
</HEAD>
<BODY>
<H3><HR WIDTH="100%">Applet HTML Page<HR WIDTH="100%"></H3>
<P>
<APPLET codebase="classes" code="test/TestApplet.class" width=350 height=200></APPLET>
</P>
<HR WIDTH="100%"><FONT SIZE=-1><I>Generated by NetBeans IDE</I></FONT>
</BODY>
</HTML>
nb 我有test包中的文件;）
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestFrame {
public static void main(String[] args) {
new TestFrame();
}
public TestFrame() {
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 TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
现在，说了这么多，我强烈反对你使用applet，他们生活在他们自己的小安全沙箱中，只会增加开发的复杂性，而是鼓励你看看{{3} }