《Java课程实习》日志（周三）

在之前的代码上添加

<span style="font-size:14px;">import java.util.Random;
import javax.swing.JOptionPane; </span>

<span style="font-size:14px;">final JLabel lblImg1 = new JLabel("图片一");
		lblImg1.addMouseListener(new MouseAdapter () {
			@Override
			public void mouseClicked(MouseEvent arg0) {
				if(arg0.getSource()==lblImg1){//+
					if(( lblImg1.getText().equals(lbGuessName.getText()))){
						JOptionPane.showMessageDialog(null,"哇，你猜对了","提示",JOptionPane.PLAIN_MESSAGE);

					}
					else {
						JOptionPane.showMessageDialog(null,"no，猜错了","错误",JOptionPane.ERROR_MESSAGE);

					}  

				}
			}
		});</span>

lblImg2.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent arg1) {
				if(arg1.getSource()==lblImg2){//+
					if(( lblImg2.getText().equals(lbGuessName.getText()))){
						JOptionPane.showMessageDialog(null,"哇，你猜对了","提示",JOptionPane.PLAIN_MESSAGE);

					}
					else {
						JOptionPane.showMessageDialog(null,"no，猜错了","错误",JOptionPane.ERROR_MESSAGE);

					}
				}
			}
		});

	final JLabel lblImg3 = new JLabel("图片三");
		lblImg3.addMouseListener(new MouseAdapter() {

			@Override
			public void mouseClicked(MouseEvent arg2) {
				if(arg2.getSource()==lblImg3){//+
					if(( lblImg3.getText().equals(lbGuessName.getText()))){
						JOptionPane.showMessageDialog(null,"哇，你猜对了","提示",JOptionPane.PLAIN_MESSAGE);
					}
					else {
						JOptionPane.showMessageDialog(null,"no，猜错了","错误",JOptionPane.ERROR_MESSAGE);
					}
				}
			}
		});

把这代码

String strTmp = fileArray[index].toString();
					index++;
					if(index==NUM_IMG)
						index = 0;
					jlbImg1.setIcon(new ImageIcon(strTmp));

					index++;
					jlbImg2.setIcon(new ImageIcon(strTmp));
					index++;
					if(e.getSource()==btnGuessAgain ){ //如果是next按钮
						String strTmp2 = fileArray[index].toString();
						index++;

						jlbImg2.setIcon(new ImageIcon(strTmp2));

						index++;
					}

				}   String strTmp1 = fileArray[index].toString();
				index++;
				jlbImg3.setIcon(new ImageIcon(strTmp1));
			}
		});

改成

Random random = new Random(System.currentTimeMillis());//+
					ImageIcon icon;
					//int k[] = null;
					for(int i=0;i<3;i++)
					{
						index = random.nextInt(NUM_IMG);
						String strTmp = fileArray[index].toString();
						String filename1=fileArray[index].getName();
						try {
							icon = new ImageIcon(ImageIO.read(new File(strTmp)));
							// 从图表中获取到图片
							Image image = icon.getImage();
							// 缩放图像
							Image smallImage = image.getScaledInstance(150,200,Image.SCALE_FAST);
							//把Image文件转化为ImageIcon
							icon = new ImageIcon(smallImage);
							if(index==NUM_IMG)
								index = 0;
							switch(i)
							{
							case 0:
								System.out.println(fileArray[index].getName());
								lblImg1.setIcon(icon);
								lblImg1.setText(filename1);
								break;
							case 1:
								System.out.println(fileArray[index].getName());
								lblImg2.setIcon(icon);
								lblImg2.setText(filename1);
								break;
							case 2:
								System.out.println(fileArray[index].getName());
								lblImg3.setIcon(icon);
								lblImg3.setText(filename1);
								break;
							}
						} catch (IOException e1) {
							e1.printStackTrace();
						}
					}
				}
				@SuppressWarnings("unused")
				Random random1 = new Random(index);
				//i = index;
				System.out.println(fileArray[index].getName());
				String filename=fileArray[index].getName();
				lbGuessName.setText(filename);
			}
		});

就能实现以下功能

不足之处就是第二个文本框不选择txt文件也能实现该功能，且能猜对的总是最后一个，不是随机的，还有就是三张图片有时候会出现两张一样的。

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