NetBeans与Eclipse的Java布局定位

我正在尝试创建一个简单的幻灯片程序，比如Powerpoint。为了设计它的GUI，我使用了Netbeans和，然后将GUI代码从Netbeans复制到Eclipse

Netbeans生成了以下代码：

    pg = new javax.swing.JPanel();
    jScrollPane1 = new javax.swing.JScrollPane();
    jPanel1 = new javax.swing.JPanel();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    setBackground(new java.awt.Color(153, 153, 153));

    pg.setBackground(new java.awt.Color(255, 255, 255));
    pg.setForeground(new java.awt.Color(255, 255, 255));
    pg.setPreferredSize(new java.awt.Dimension(255, 234));

    javax.swing.GroupLayout pgLayout = new javax.swing.GroupLayout(pg);
    pg.setLayout(pgLayout);
    pgLayout.setHorizontalGroup(
        pgLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 357, Short.MAX_VALUE)
    );
    pgLayout.setVerticalGroup(
        pgLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 257, Short.MAX_VALUE)
    );

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 62, Short.MAX_VALUE)
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 279, 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(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(pg, javax.swing.GroupLayout.DEFAULT_SIZE, 357, Short.MAX_VALUE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 279, Short.MAX_VALUE)
        .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(pg, javax.swing.GroupLayout.DEFAULT_SIZE, 257, Short.MAX_VALUE)
            .addContainerGap())
    );

    pack();

我的问题是，我想将右侧的

jPanel1

更改为我自己的类，该类扩展了

JPanel

。为此，我写道：

JPanel jPanel1 = new JPanel();  
jPanel1.add(new ToolBoxGUI("ToolBox"));

---

但是当我运行代码时，右边没有

ToolBoxGUI

class按钮。如何解决此问题？

jPanel1

使用组布局。要使其可见，必须将ToolBoxGUI添加到此GroupLayout。如果要使ToolBoxGUI成为jPanel1的唯一组件，请删除设置jPanel1布局的代码：

javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
    jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
    .addGap(0, 62, Short.MAX_VALUE)
);
jPanel1Layout.setVerticalGroup(
    jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
    .addGap(0, 279, Short.MAX_VALUE)
);

并将其替换为

jPanel1.setLayout(new BorderLayout());

或者，如果您想用ToolBoxGUI替换jPanel1，请删除与上面相同的代码，并使用初始化jPanel1

jPanel1 = new ToolBoxGUI();

---

一种方法是将bean添加到您的Netbeans GUI中。我现在没有这个程序，但我认为在GUI创建者的右边有一个工具箱。其中一个选项是添加一个bean。单击“CreateBean”并键入“ToolBoxGUI”作为类名。然后你可以把它拖到你的面板上。从长远来看，手工设计UI更好。将帮助您理解这些差异，但总的来说，我发现

BoxLayout

（以及

Box

类）、

BorderLayout

和

FlowLayout

是最有用的。我从来没用过这个，但我知道有些人真的很喜欢它。坚持使用NetBeans……从长远来看，你会更快乐：）