fork download
copy 
  1. import java.awt.*;
  2. import java.awt.event.*;
  3. import javax.swing.*;
  4.  
  5. public class Sample7 extends JApplet
  6. {
  7.    private JLabel lb1, lb2;
  8.  
  9.    public void init()
  10.    {
  11.       lb1 = new JLabel("矢印キーで選びなさい");
  12.       lb2 = new JLabel();
  13.  
  14.       add(lb1, BorderLayout.NORTH);
  15.       add(lb2, BorderLayout.SOUTH);
  16.  
  17.       addKeyListener(new SampleKeyListener());
  18.    }
  19.  
  20.    class SampleKeyListener extends KeyAdapter
  21.    {
  22.        @Override
  23.       public void keyPressed(KeyEvent e)
  24.       {
  25.          String str;
  26.          int k = e.getKeyCode();
  27.          switch(k){
  28.             case KeyEvent.VK_UP:
  29.               str = "上"; break;
  30.             case KeyEvent.VK_DOWN:
  31.               str = "下"; break;
  32.             case KeyEvent.VK_LEFT:
  33.               str = "左"; break;
  34.             case KeyEvent.VK_RIGHT:
  35.               str = "右"; break;
  36.             default:
  37.               str = "他のキー";
  38.          }
  39.          lb2.setText(str + "ですね");
  40.       }
  41.    }
  42. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
copy 
Standard input is empty
compilation info 
Main.java:5: error: class Sample7 is public, should be declared in a file named Sample7.java
public class Sample7 extends JApplet
       ^
1 error
stdout
copy 
Standard output is empty
https://ideone.com/iTLDcz
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!