如何将 jscrollpane 添加到 jframe? [英] how to add jscrollpane to jframe?
问题描述
我有以下源代码...有人可以给我建议如何将 jscrollpane 添加到 jframe 上吗?我尝试了几次将它添加到 jframe 但没有任何进展.它甚至没有显示.
public class Form3 {JFrame jframe = new JFrame("Etiket print.");JPanel panel1 = new JPanel();JPanel panel2 = new JPanel();JPanel panel3 = new JPanel();JPanel panel4 = new JPanel();JScrollPane scrollFrame = new JScrollPane(panel2);颜色 myBlue1Color = 新颜色(168, 175, 247);颜色 myBlue2Color = 新颜色(139, 146, 255);公共 Form3(){jframe.setMinimumSize(new Dimension(1280, 1000));panel2.setLayout(new BoxLayout(panel2, BoxLayout.Y_AXIS));panel2.setAutoscrolls(true);jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//---------------------------------标题panel1 = createSquareJPanel(Color.YELLOW, 600,200);panel3 = createSquareJPanel(Color.GREEN, 400,200);panel4 = createSquareJPanel(Color.white, 280,200);JPanel 容器 = new JPanel();JPanel container1 = new JPanel();JPanel container2 = new JPanel();container.setLayout(new BoxLayout(container, BoxLayout.Y_AXIS));container1.setLayout(new BoxLayout(container1, BoxLayout.Y_AXIS));container2.setLayout(new BoxLayout(container2, BoxLayout.X_AXIS));容器 1.添加(面板 1);container2.add(container1);container2.add(panel3);container2.add(panel4);容器.添加(容器 2);容器.添加(面板2);{for (int i=0; i<25; i++){JPanel线束面板=新的JPanel();线束面板.setMinimumSize(新维度(1280, 70));线束面板.setMaximumSize(新维度(1280, 70));harnessPanel.setPreferredSize(new Dimension(1280, 70));如果(我%2== 0){线束面板.setBackground(myBlue1Color);}别的 {线束面板.setBackground(myBlue2Color);}panel2.add(harnessPanel);线束面板.repaint();线束面板.validate();}panel2.repaint();panel2.validate();}jframe.add(scrollFrame);jframe.add(容器);jframe.pack();jframe.setLocationRelativeTo(null);jframe.setVisible(true);}私人 JPanel createSquareJPanel(颜色颜色,int size1,int size2){JPanel tempPanel = new JPanel();tempPanel.setBackground(颜色);tempPanel.setMinimumSize(new Dimension(size1, size2));tempPanel.setMaximumSize(new Dimension(size1, size2));tempPanel.setPreferredSize(new Dimension(size1, size2));返回临时面板;}公共静态无效主(字符串参数[]){SwingUtilities.invokeLater(new Runnable() {@覆盖公共无效运行(){Form3 myF=new Form3();}});};}
我的应用图片:
实际状态:
JFrame
默认使用 BorderLayout
.它的默认位置(如果你没有指定)是 CENTER
.
BorderLayout
将只允许一个组件占据其 5 个可用位置中的任何一个.
所以当你...
jframe.add(scrollFrame);jframe.add(容器);
它将 scrollFrame
添加到中心位置并在您添加 container
时有效地将其删除(实际上并没有删除它,但结果几乎相同).
尝试提供位置约束.例如...
jframe.add(scrollFrame);jframe.add(容器,BorderLayout.SOUTH);
有关详细信息,请参阅如何使用 BorderLayout>
I have following source code...Can someone please give me an advice how to add jscrollpane onto jframe? I tried several time to add it to jframe but without any progress. It is not even showing.
public class Form3 {
JFrame jframe = new JFrame("Etiket print.");
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
JPanel panel3 = new JPanel();
JPanel panel4 = new JPanel();
JScrollPane scrollFrame = new JScrollPane(panel2);
Color myBlue1Color = new Color(168, 175, 247);
Color myBlue2Color = new Color(139, 146, 255);
public Form3(){
jframe.setMinimumSize(new Dimension(1280, 1000));
panel2.setLayout(new BoxLayout(panel2, BoxLayout.Y_AXIS));
panel2.setAutoscrolls(true);
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//---------------------------------Header
panel1 = createSquareJPanel(Color.YELLOW, 600,200);
panel3 = createSquareJPanel(Color.GREEN, 400,200);
panel4 = createSquareJPanel(Color.white, 280,200);
JPanel container = new JPanel();
JPanel container1 = new JPanel();
JPanel container2 = new JPanel();
container.setLayout(new BoxLayout(container, BoxLayout.Y_AXIS));
container1.setLayout(new BoxLayout(container1, BoxLayout.Y_AXIS));
container2.setLayout(new BoxLayout(container2, BoxLayout.X_AXIS));
container1.add(panel1);
container2.add(container1);
container2.add(panel3);
container2.add(panel4);
container.add(container2);
container.add(panel2);
{
for (int i=0; i<25; i++){
JPanel harnessPanel= new JPanel();
harnessPanel.setMinimumSize(new Dimension(1280, 70));
harnessPanel.setMaximumSize(new Dimension(1280, 70));
harnessPanel.setPreferredSize(new Dimension(1280, 70));
if(i%2==0) {
harnessPanel.setBackground(myBlue1Color);
}
else {
harnessPanel.setBackground(myBlue2Color);
}
panel2.add(harnessPanel);
harnessPanel.repaint();
harnessPanel.validate();
}
panel2.repaint();
panel2.validate();
}
jframe.add(scrollFrame);
jframe.add(container);
jframe.pack();
jframe.setLocationRelativeTo(null);
jframe.setVisible(true);
}
private JPanel createSquareJPanel(Color color, int size1, int size2)
{
JPanel tempPanel = new JPanel();
tempPanel.setBackground(color);
tempPanel.setMinimumSize(new Dimension(size1, size2));
tempPanel.setMaximumSize(new Dimension(size1, size2));
tempPanel.setPreferredSize(new Dimension(size1, size2));
return tempPanel;
}
public static void main (String args[]){
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Form3 myF=new Form3();
}
});
};
}
picture of my app:
actual state:
JFrame
uses a BorderLayout
by default. It's default position (if you don't specify one) is CENTER
.
BorderLayout
will only allow one component to occupy any of it's 5 available positions.
So when you do...
jframe.add(scrollFrame);
jframe.add(container);
It adds the scrollFrame
to the center position and effectively removes it when you add container
(it doesn't actually remove it, but the result is just about the same).
Try supplying a position constraint. For example...
jframe.add(scrollFrame);
jframe.add(container, BorderLayout.SOUTH);
See How to use BorderLayout for more details
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