用windowbuilder重新调整窗体大小

Question

我想用3行3列的formlayout。中间的盒子被设置为固定的宽度和固定的高度，其他盒子增长。我认为这会让我的形象保持在中心位置，而不会随着框架被用户扩展而增长。

下面是我在做什么，但我发现错误控制台：

package me.codplaymakers.com; 


    import java.awt.EventQueue; 
    import java.awt.Graphics; 
    import java.awt.Image; 
    import java.awt.image.BufferedImage; 

    import javax.swing.JFrame; 
    import javax.swing.JPanel; 
    import javax.swing.border.EmptyBorder; 
    import javax.swing.ImageIcon; 
    import javax.swing.JLabel; 

    import com.jgoodies.forms.layout.FormLayout; 
    import com.jgoodies.forms.layout.ColumnSpec; 
    import com.jgoodies.forms.layout.RowSpec; 

    public class WindowBuilderTest2 extends JFrame { 

    /** 
    * 
    */ 
    private static final long serialVersionUID = 1L; 
    private JPanel contentPane; 

    /** 
    * Launch the application. 
    */ 
    public static void main(String[] args) { 
     EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       try { 
        WindowBuilderTest2 frame = new WindowBuilderTest2(); 
        frame.setVisible(true); 
       } catch (Exception e) { 
        e.printStackTrace(); 
       } 
      } 
     }); 
    } 

    /** 
    * Create the frame. 
    */ 
    public WindowBuilderTest2() { 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     setBounds(0,0, 1200, 800); 
     contentPane = new JPanel(); 
     contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); 
     setContentPane(contentPane); 

     contentPane.setLayout(new FormLayout(new ColumnSpec[] { 
       ColumnSpec.decode("left:default:grow"), 
       ColumnSpec.decode("800px"), 
       ColumnSpec.decode("right:default:grow"),}, 
      new RowSpec[] { 
       RowSpec.decode("top:default:grow"), 
       RowSpec.decode("500px"), 
       RowSpec.decode("bottom:default:grow"),})); 

     JLabel lblNewLabel = new JLabel(""); 
     ImageIcon icon = new ImageIcon(this.getClass().getResource("/FullSizeRender.jpg")); 
     Image img = icon.getImage(); 
     BufferedImage bi = new BufferedImage(lblNewLabel.getWidth(), lblNewLabel.getHeight(), BufferedImage.TYPE_INT_ARGB); 
     Graphics g = bi.createGraphics(); 
     g.drawImage(img, 0, 0,lblNewLabel.getWidth(),lblNewLabel.getHeight(), null); 
     ImageIcon newIcon = new ImageIcon(bi); 
     lblNewLabel.setIcon(newIcon); 


     contentPane.add(lblNewLabel, "2, 2"); 
    } 

    } 

和这里的错误信息：

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: com/jgoodies/common/base/Preconditions 
    at com.jgoodies.forms.layout.FormSpec.<init>(FormSpec.java:179) 
    at com.jgoodies.forms.layout.ColumnSpec.<init>(ColumnSpec.java:147) 
    at com.jgoodies.forms.layout.FormSpecs.<clinit>(FormSpecs.java:62) 
    at com.jgoodies.forms.layout.LayoutMap.createRoot(LayoutMap.java:569) 
    at com.jgoodies.forms.layout.LayoutMap.getRoot(LayoutMap.java:217) 
    at com.jgoodies.forms.layout.ColumnSpec.decode(ColumnSpec.java:199) 
    at me.codplaymakers.com.WindowBuilderTest2.<init>(WindowBuilderTest2.java:54) 
    at me.codplaymakers.com.WindowBuilderTest2$1.run(WindowBuilderTest2.java:34) 
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311) 
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756) 
    at java.awt.EventQueue.access$500(EventQueue.java:97) 
    at java.awt.EventQueue$3.run(EventQueue.java:709) 
    at java.awt.EventQueue$3.run(EventQueue.java:703) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) 
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:726) 
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) 
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) 
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) 
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) 
Caused by: java.lang.ClassNotFoundException: com.jgoodies.common.base.Preconditions 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
    ... 22 more 

Answer 1

好了，第一个问题是我需要在构建路径中包含jgoodies-common-1.1.1.jar。第二个问题是设置图像的边界：

lblNewLabel.setBounds(0, 0, 800, 500);