麻烦大家帮忙看看

cashlu 2010-03-19 12:46:11
学习中,从书上抄下来的一段代码,编译运行时报错,麻烦帮忙看一下错在什么地方了?报错如下:


--------------------Configuration: <Default>--------------------
E:\JAVA_Workspace\ImageViwer.java:40: 非法的类型开始
if (result == JFileChooser.APPROVE_OPTION)
^
E:\JAVA_Workspace\ImageViwer.java:40: 需要 <标识符>
if (result == JFileChooser.APPROVE_OPTION)
^
E:\JAVA_Workspace\ImageViwer.java:40: 需要 <标识符>
if (result == JFileChooser.APPROVE_OPTION)
^
3 错误

Process completed.




代码如下:


import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;

public class ImageViwer
{
public static void main(String[] args)
{
JFrame frame = new ImageViwerFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(ture);
}
}

class ImageViwerFrame extends JFrame
{
public ImageViwerFrame()
{
setTitle("ImageViwer");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

label = new JLabel();
add(label);

chooser = new JFileChooser();
chooser.setCurrentDirectory(new File('.'));

JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);

JMenu menu = new JMenu("File");
menuBar.add(menu);

JMenuItem openItem = new JmenuItem("open");
menu.add(openItem);
openItem.addActionListener(new ActionListener()
{
int result = chooser.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION)
{
String name = chooser.getSelectedFile().getPath();
label.setIcon(new ImageIcon(name));

}
});

JMenuItem exitItem = new JMenuItem("EXIT");
menu.add(exitItem);
exitItem.addActionListener(new AcitonListener()
{
public void actionPerformed(ActionEvent event)
{
System.exit(0);
}
});
}
private JLabel label;
private JFileChooser chooser;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULD_HEIGH = 400;
}
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cashlu 2010-03-19
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谢谢各位的帮助,问题搞定!
小余 2010-03-19
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兄弟 我顶你了 真的
liuzch 2010-03-19
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import java.awt.event.*;
import java.io.*;
import javax.swing.*;

public class ImageViwer
{
public static void main(String[] args)
{
JFrame frame = new ImageViwerFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}

class ImageViwerFrame extends JFrame
{
public ImageViwerFrame()
{
setTitle("ImageViwer");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGH);

label = new JLabel();
add(label);

chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));

JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);


JMenu menu = new JMenu("File");
menuBar.add(menu);

JMenuItem openItem = new JMenuItem("open");
menu.add(openItem);
openItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e){
int result = chooser.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION)
{
String name = chooser.getSelectedFile().getPath();
label.setIcon(new ImageIcon(name));

}
}
});

JMenuItem exitItem = new JMenuItem("EXIT");
menu.add(exitItem);
exitItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
System.exit(0);
}
});
}
private JLabel label;
private JFileChooser chooser;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGH = 400;
}

兄弟,别急,从基础开始,你那段代码上的错误都是些低级错误,再接再厉吧
liulu525800 2010-03-19
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LS的很专业,建议LZ好好看看
Ark032425 2010-03-19
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package csdn;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;


public class ImageViwerFrame extends JFrame{

private JLabel label;
private JFileChooser chooser;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 400;
public ImageViwerFrame()
{
setTitle("ImageViwer");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

label = new JLabel();
add(label);

chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));

JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);

JMenu menu = new JMenu("File");
menuBar.add(menu);

JMenuItem openItem = new JMenuItem("open");
menu.add(openItem);

openItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
int result = chooser.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION)
{
String name = chooser.getSelectedFile().getPath();
label.setIcon(new ImageIcon(name));

}
}
}
);

JMenuItem exitItem = new JMenuItem("EXIT");
menu.add(exitItem);
exitItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
}
);
}



public static void main(String[] args)
{
JFrame frame = new ImageViwerFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}

}


匿名内部类写法
Ark032425 2010-03-19
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考回去好好比较一下吧
Ark032425 2010-03-19
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package csdn;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;


public class ImageViwerFrame extends JFrame{

private JLabel label;
private JFileChooser chooser;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 400;
public ImageViwerFrame()
{
setTitle("ImageViwer");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

label = new JLabel();
add(label);

chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));

JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);

JMenu menu = new JMenu("File");
menuBar.add(menu);

JMenuItem openItem = new JMenuItem("open");
menu.add(openItem);
class MyActionListener implements ActionListener{

public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
int result = chooser.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION)
{
String name = chooser.getSelectedFile().getPath();
label.setIcon(new ImageIcon(name));

}
}
};
openItem.addActionListener(new MyActionListener());

JMenuItem exitItem = new JMenuItem("EXIT");
menu.add(exitItem);

class MyActionListener2 implements ActionListener{

public void actionPerformed(ActionEvent e) {
System.exit(0);
}
};

exitItem.addActionListener(new MyActionListener2());
}



public static void main(String[] args)
{
JFrame frame = new ImageViwerFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}

}
zyus1987 2010-03-19
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这位大哥啊? 看完你的代码以后~!我的眼泪哇哇的~!
你再学点简单的吧~!真难为你了~!
justwalking 2010-03-19
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1.frame.setVisible(ture); true写错了, 编译不过
2.DEFAULT_HEIGHT 这个成员变量定义成DEFAULD_HEIGH了,编译不过
zyus1987 2010-03-19
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占坑~!

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