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我的文本字段没有被添加到我的Jframe中,我想让这个文本字段可用,以便我可以使用它来改变绘制在paint中的矩形的高度。在actionperfomred IM试图从该字段的值,并希望这将重新绘制图像正确的值不添加TextField到jFrame
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;
import java.net.*;
import java.sql.*;
import java.lang.Object;
import java.awt.Graphics;
import java.awt.Graphics2D;
public class Test extends JPanel implements ActionListener{
JTextField textField;
JFrame f=new JFrame();
int x=77, y=441, w=23, h=10, entry;
BufferedImage img=null;
public void init(){
JTextField textField=new JTextField();
f.add(textField);
textField.setBounds(10,10,40,30);
textField.setVisible(true);
textField.addActionListener(this);
}
// BufferedImage img;
public static void main(String[] args) {
BufferedImage img =new BufferedImage(100, 50,BufferedImage.TYPE_INT_ARGB);
//textField = new JTextField();
JFrame f = new JFrame("Load Image Sample");
/*textField=new JTextField();
textField.addActionListener(this);
f.add(textField);
textField.setBounds(10,10,40,30);
textField.setVisible(true);*/
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
f.add(new Test());
f.pack();
f.setVisible(true);
}
public void paintComponent(Graphics g) {
g.drawImage(img, 0, 0, null);
Graphics2D i = img.createGraphics();
Color myColor = Color.decode("#32004b");
i.setColor(myColor);
i.fillRect(x,y,w,h);
// g.fillRect(10,10,10,10);
}
public Test() {
try {
img = ImageIO.read(new File("sales-goal.png"));
} catch (IOException e) {}
//77,441,23,10
}
public Dimension getPreferredSize() {
if (img == null) {
return new Dimension(100,100);
} else {
//return new Dimension(img.getWidth(null), img.getHeight(null));
return new Dimension(300,600);
}
}
public void actionPerformed(ActionEvent e) {
Graphics g= getGraphics();
if (e.getSource() == textField) {
entry= Integer.parseInt(textField.getText());
g.drawString("Test",50,50);
entry=h;
}
}
}
重复的[我不知道如何从我的文本字段中获取数据](http://stackoverflow.com/questions/10145493/im-not-sure-how-to-get-the- data-from-my-text-field) – trashgod 2012-04-13 21:02:29
随机评论:a)you _must_在paintComponent中调用super b)有两个JFrames c)在getPref中返回一个硬编码大小没有意义我);评论线是要走的路d)永远不要使用getGraphics e)永远不要使用setBounds f)为什么你要在图像的图形上绘画......总之(没有冒犯的意思):你的代码是一团糟。我建议你退后一步,在教科书的第一页重新开始 – kleopatra 2012-04-14 07:26:14