Java 如何使图像根据父JLabel'自动缩放其大小;s大小,在Netbeans GUI Builder中?
背景:- 我需要使用Netbeans GUI Builder制作一个Swing GUI。第一个子任务是在整个背景中显示图像 我一直都是这样做的。我基本上制作了一个JFrame,将其布局设置为GridBagLayout,然后添加了一个透明(通过取消选中不透明属性)JPanel。(问题1) 之后,我向JFrame添加了一个JLabel,删除了它的文本并添加了一个图像。(问题2) 问题:-Java 如何使图像根据父JLabel'自动缩放其大小;s大小,在Netbeans GUI Builder中?,java,swing,user-interface,netbeans,image-scaling,Java,Swing,User Interface,Netbeans,Image Scaling,背景:- 我需要使用Netbeans GUI Builder制作一个Swing GUI。第一个子任务是在整个背景中显示图像 我一直都是这样做的。我基本上制作了一个JFrame,将其布局设置为GridBagLayout,然后添加了一个透明(通过取消选中不透明属性)JPanel。(问题1) 之后,我向JFrame添加了一个JLabel,删除了它的文本并添加了一个图像。(问题2) 问题:- 首先,当我添加JPanel时,它不会显示其调整大小句柄。我 谷歌搜索了一下就找到了,在那里可以看到它 当他们创建
EDIT1@Braj
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package com.dev_nna.dbp;
public class JFrameParent extends javax.swing.JFrame {
/**
* Creates new form JFrameParent
*/
public JFrameParent() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new java.awt.GridBagLayout());
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
getContentPane().add(jPanel1, new java.awt.GridBagConstraints());
jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/com/dev_nna/dbp/scheduler/resources/Abstract-white-and-blue-backgrounds.jpg"))); // NOI18N
jLabel1.setText("jLabel1");
getContentPane().add(jLabel1, new java.awt.GridBagConstraints());
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(JFrameParent.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(JFrameParent.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(JFrameParent.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(JFrameParent.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new JFrameParent().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel jLabel1;
private javax.swing.JPanel jPanel1;
// End of variables declaration
}
/*
*要更改此许可证标题,请在“项目属性”中选择“许可证标题”。
*要更改此模板文件,请选择工具|模板
*然后在编辑器中打开模板。
*/
包com.dev_nna.dbp;
公共类JFrameParent扩展了javax.swing.JFrame{
/**
*创建新表单JFrameParent
*/
公共JFrameParent(){
初始化组件();
}
/**
*从构造函数中调用此方法来初始化表单。
*警告:不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告(“未选中”)
//
私有组件(){
jPanel1=newjavax.swing.JPanel();
jLabel1=newjavax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(新java.awt.GridBagLayout());
javax.swing.GroupLayout jPanel1Layout=新的javax.swing.GroupLayout(jPanel1);
setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,0,短.MAX_值)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,0,短.MAX_值)
);
getContentPane().add(jPanel1,new java.awt.GridBagConstraints());
jLabel1.setIcon(新的javax.swing.ImageIcon(getClass().getResource(“/com/dev_nna/dbp/scheduler/resources/Abstract white and blue backgrounds.jpg”);//NOI18N
jLabel1.setText(“jLabel1”);
getContentPane().add(jLabel1,new java.awt.GridBagConstraints());
包装();
}//
/**
*@param指定命令行参数
*/
公共静态void main(字符串参数[]){
/*设置Nimbus的外观和感觉*/
//
/*如果Nimbus(在JavaSE6中引入)不可用,请使用默认的外观。
*详情请参阅http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
试一试{
for(javax.swing.UIManager.LookAndFeelInfo:javax.swing.UIManager.getInstalledLookAndFeels()){
if(“Nimbus”.equals(info.getName())){
setLookAndFeel(info.getClassName());
打破
}
}
}捕获(ClassNotFoundException ex){
getLogger(JFrameParent.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(实例化异常){
getLogger(JFrameParent.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}捕获(非法访问例外){
getLogger(JFrameParent.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(javax.swing.UnsupportedLookAndFeelException ex){
getLogger(JFrameParent.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}
//
/*创建并显示表单*/
invokeLater(new Runnable()){
公开募捐{
新建JFrameParent().setVisible(true);
}
});
}
//变量声明-不修改
私有javax.swing.JLabel jLabel1;
私有javax.swing.JPanel jPanel1;
//变量结束声明
}
“或者如果有办法完全禁用窗口大小调整。”
您可以设置大小调整
public class PanelForm extends javax.swing.JPanel {
private BufferedImage image;
public PanelForm() {
try {
image = ImageIO.read(getClass().getResource("/path/to/image/png"));
} catch (IOException ex) {
ex.printStackTrace();
}
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, getWidth(), getHeight(), this);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(500, 500);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run() {
JFrame frame = new JFrame();
frame.add(new PanelForm()); // <--- add it here
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}