Java 向JPanel添加形状
我有一个简单的Java 向JPanel添加形状,java,swing,jframe,jpanel,java-2d,Java,Swing,Jframe,Jpanel,Java 2d,我有一个简单的JFrame,我在这个框架内添加了一个JPanel。我该如何添加一个形状:即一个彩色正方形到面板上,我给了这个面板一个变量名gamePanel 这是代码。字面上没有在那里,但我想在面板中添加正方形。创建一个方块折叠游戏 package blockmanagertest; import java.awt.Color; import java.awt.Graphics; public class BlockGUI extends javax.swing.JFrame {
JFrame
,我在这个框架内添加了一个JPanel
。我该如何添加一个形状:即一个彩色正方形到面板上,我给了这个面板一个变量名gamePanel
这是代码。字面上没有在那里,但我想在面板中添加正方形。创建一个方块折叠游戏
package blockmanagertest;
import java.awt.Color;
import java.awt.Graphics;
public class BlockGUI extends javax.swing.JFrame {
/**
* Creates new form BlockGUI
*/
public BlockGUI() {
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() {
gamePanel = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
gamePanel.setBackground(new java.awt.Color(38, 38, 38));
javax.swing.GroupLayout gamePanelLayout = new javax.swing.GroupLayout(gamePanel);
gamePanel.setLayout(gamePanelLayout);
gamePanelLayout.setHorizontalGroup(
gamePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 562, Short.MAX_VALUE)
);
gamePanelLayout.setVerticalGroup(
gamePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 738, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(gamePanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(175, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(gamePanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
);
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(BlockGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(BlockGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(BlockGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(BlockGUI.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 BlockGUI().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JPanel gamePanel;
// End of variables declaration
public void paintComponent(Graphics g) {
super.paintComponents(g);
g.setColor(Color.red);
g.fillRect(150, 150, 150, 150);
}
}
包块管理器测试;
导入java.awt.Color;
导入java.awt.Graphics;
公共类BlockGUI扩展了javax.swing.JFrame{
/**
*创建新表单BlockGUI
*/
公共BlockGUI(){
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(){
gamePanel=newjavax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setBackground(新java.awt.Color(38,38,38));
javax.swing.GroupLayout gamePanelLayout=新建javax.swing.GroupLayout(gamePanel);
gamePanel.setLayout(gamePanelLayout);
gamePanelLayout.setHorizontalGroup(
gamePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,562,短.MAX_值)
);
gamePanelLayout.setVerticalGroup(
gamePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,738,短。最大值)
);
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(gamePanel,javax.swing.GroupLayout.PREFERRED\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addContainerGap(175,简称最大值))
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(gamePanel,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u VALUE)
.addContainerGap())
);
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(BlockGUI.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(实例化异常){
getLogger(BlockGUI.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}捕获(非法访问例外){
getLogger(BlockGUI.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(javax.swing.UnsupportedLookAndFeelException ex){
getLogger(BlockGUI.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BlockGUI().setVisible(true);
}
});
}
//变量声明-不修改
私有javax.swing.JPanel游戏面板;
//变量结束声明
公共组件(图形g){
超级组件(g);
g、 setColor(Color.red);
g、 fillRect(150150150150);
}
}
,第一步:停止使用GUI构建器。是的,我将丢弃它,从头开始编写