标签：java swing netbeans jframe layout-manager
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“)”
标签：java,swing,netbeans,jframe,layout-manager 来源： https://codeday.me/bug/20190928/1826186.html
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