[英]add image to JPanel in NetBeans
我是java swing的新手,現在我正在使用NetBeant通過內置於NetBeans的拖放設計器來構建GUI。 我現在面臨的問題是,我有下面發布的代碼,它是用Eclipse編寫的,如你所見,我有一個擴展JPanel的類,並且我將從WEB_CAM捕獲的圖像添加到該JPanel.now,因為我切換了對於NetBeans,我使用設計器創建了JFrame,JPanel,JButton,在用NetBeans編寫的代碼中,我不知道如何將捕獲的圖像添加到JPanel。
在eclipse中,我在另一個類中創建了以下發布的代碼,但是在NetBeans中,每件事都是自動生成的,因此我必須做與eclipse中相同的工作。 我不知道如何在NetBeans中向JPanel添加圖像。
JPanel inEclipse
class FacePanel extends JPanel {
private BufferedImage image;
int count = 0;
public FacePanel() {
super();
}
public void setFace (BufferedImage img) {
this.image = img;
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (this.image == null) {
System.out.println("image is null");
return;
}
g.drawImage(this.image, 10, 10, this.image.getWidth(), this.image.getHeight(), null);
g.setFont(new Font("arial", 2, 20));
g.setColor(Color.WHITE);
g.drawString("processing frame by frame [ frame: " + ( count++) + " ]", 150, 150);
}
}
NetBeans中的代碼
private void initComponents() {
jpanel1_Preview = new javax.swing.JPanel();
btn_Play = new javax.swing.JButton();
btn_Pause = new javax.swing.JButton();
btn_Capture = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jpanel1_Preview.setBorder(javax.swing.BorderFactory.createTitledBorder("Cam_Preview"));
javax.swing.GroupLayout jpanel1_PreviewLayout = new javax.swing.GroupLayout(jpanel1_Preview);
jpanel1_Preview.setLayout(jpanel1_PreviewLayout);
jpanel1_PreviewLayout.setHorizontalGroup(
jpanel1_PreviewLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
jpanel1_PreviewLayout.setVerticalGroup(
jpanel1_PreviewLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 225, Short.MAX_VALUE)
);
btn_Play.setText("play");
btn_Play.setSelected(true);
btn_Pause.setText("pause");
btn_Pause.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btn_PauseActionPerformed(evt);
}
});
btn_Capture.setText("capture");
btn_Capture.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btn_CaptureActionPerformed(evt);
}
});
class FacePanel extends JPanel {
更改為public class FacePanel extends JPanel {
,否則Netbeans將無法創建它的實例。 FacePanel
類從Project Explorer拖到窗體上。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.