java – Jframe执行时尺寸不正确,有什么原因吗？
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我正在制作一个游戏,但每当我运行第二个jFrame时,我必须调整它以便为第二个jFrame获得正确的大小,任何人都知道为什么？
这是第一个jFrame类中打开第二个方法的方法：
private void playButtonMouseClicked(java.awt.event.MouseEvent evt) {
if (playerOneNameText.getText().equals(""))
{
}
if (playerTwoNameText.getText().equals(""))
{
}
else{
pOneName = playerOneNameText.getText();
pTwoName = playerTwoNameText.getText();
ChessBoardUI class1 = new ChessBoardUI(); // Creating object of Class1
class1.setVisible(true);
this.setVisible(false);
}
}
这是第二个jFrame类,我必须调整大小才能使ge tit正确：
package chess;
public class ChessBoardUI extends javax.swing.JFrame {
public ChessBoardUI() {
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() {
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
blackTeamName = new javax.swing.JLabel();
whiteTeamName = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(null);
getContentPane().add(jLabel2);
jLabel2.setBounds(21, 49, 0, 0);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/chess/board.jpg"))); // NOI18N
getContentPane().add(jLabel3);
jLabel3.setBounds(0, 30, 400, 400);
jLabel1.setText("Black:");
getContentPane().add(jLabel1);
jLabel1.setBounds(400, 100, 34, 16);
jLabel4.setText("White:");
getContentPane().add(jLabel4);
jLabel4.setBounds(400, 150, 38, 16);
blackTeamName.setText("jLabel5");
getContentPane().add(blackTeamName);
blackTeamName.setBounds(400, 120, 41, 16);
whiteTeamName.setText("jLabel5");
getContentPane().add(whiteTeamName);
whiteTeamName.setBounds(400, 170, 41, 16);
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(ChessBoardUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(ChessBoardUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(ChessBoardUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(ChessBoardUI.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 ChessBoardUI().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel blackTeamName;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel whiteTeamName;
// End of variables declaration
}
解决方法:
我很快就读到了寻找特定方法的内容.
那种方法是：
pack();
JFrame中的这个方法非常有用但也很难处理,你需要很好地理解如何设置每个组件的正确大小.使用“null”布局也可以轻而易举地完成所有工作.
我的建议是忘记使用
setLayout(null)
因为根据我的经验,它提供的结果很少比其他布局更好.
我可以告诉你的最好的事情是使用BoxLayout.使用此布局,您可以精确设置每个组件的位置和大小.诀窍还在于你可以使用rigidArea和Glue.
你的代码可以是：
// This is a BoxLayout with top to bottom orientation, the trick is to nest many JPanel
// with BoxLayout in both the direction to have all working
// What I want to achieve is:
//
// 1. Having a main box top to bottom where I will put:
// - Top margin (a rigid area with dimension (0,MARGIN)
// - Main JPanel with BoxLayout and LINE_AXIS (left to right) orientation
// - Bottom margin (a rigid area like top margin)
//
// 2. In the main panel I will put:
// - Left Margin (a rigid area with dimensions (MARGIN,0)
// - A JPanel (leftPanel) Boxed top to bottom containing the things on the left that actually are jLabel3 and jLabel2
// - A little separator between the two panel, a rigid area (10,0) i.e.
// - A JPanel (rightPanel) Boxed top to bottom containing the remaining 4 JLabels
// - Right Margin (as left)
//
// 3. In rightPanel JPanel (BoxLayout.PAGE_AXIS, top to bottom) I will have:
// - a rigid area space to match the position that I want
// - the first label
// - a rigid area.. etc so on
//
// For each JLabel I must set all:
// - setPreferredSize(dimension)
// - setMinimumSize(dimension)
// - setMaximumSize(dimension)
//
// Then, if you specify also the JFrame is better, but you can try to pack().
// BoxLayout take care of sizes, not exceeding maximum and not making it smaller than minimum. Yust try it and you will love it.
getContentPane().setLayout(new BoxLayout(getContentPane(), BoxLayout.PAGE_AXIS);
JPanel main = new JPanel();
main.setLayout(new BoxLayout(main, BoxLayout.LINE_AXIS));
this.add(Box.createRigidArea(new Dimension(0,20))); // VERTICAL SPACE (top margin)
this.add(main);
this.add(Box.createRigidArea(new Dimension(0,20))); // VERTICAL SPACE (bottom margin)
JPanel rightPanel = new JPanel();
rightPanel.setLayout( new BoxLayout(rightPanel, BoxLayout.PAGE_AXIS));
JPanel leftPanel = new JPanel();
leftPanel.setLayout( new BoxLayout(leftPanel, BoxLayout.PAGE_AXIS));
main.add(Box.createRigidArea(new Dimension(20,0))); // HORIZONTAL SPACE (left margin)
main.add(leftPanel);
main.add(Box.createRigidArea(new Dimension(10,0))); // HORIZONTAL SPACE (between the two)
main.add(rightPanel);
main.add(Box.createRigidArea(new Dimension(20,0))); // HORIZONTAL SPACE (right margin)
// now you should have understood how it works, just try to fill the right and left panel with your labels. Remember to set preferredm, maximum and minimum sizes.
我希望这对你有用
编辑,我想念一些“)”
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