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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：
代码如下：
--------------------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;
}
...全文
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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
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~！
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
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~！
