问题描述
我有一个jframe“ Rest.java”包含空的jlabel,一个btn用来打开新的jframe参数“ Restparametre.java”包含JtextFiels,用户可以在其中编写(文章和价格),并且bnt保存以首先在jLabels中进行更新jFrame“ Rest.java”。 我用于此属性。但是我在代码中有两个问题
-
jLabels文本未正确更改(有时更改,有时不更改) 这是我使用的代码..
try{ configFile = new File("config.properties"); fis = new FileInputStream(configFile); Properties propConfig; propConfig = new Properties(); propConfig.load(fis); String st = propConfig.getProperty("article"); jLabel1.setText(st); jLabel1.repaint(); String stre = propConfig.getProperty("prix"); jLabel2.setText(stre); jLabel2.repaint(); System.out.println(st); System.out.println(stre); fis.close(); } catch(Exception e){e.printstacktrace(); }
```
public class Restparametre extends javax.swing.JFrame {
File ConfigFile = null;
public Restparametre() {
initComponents();
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String msg = jTextField2.getText();
String str= jTextField3.getText();
double dnum = Double.parseDouble(str);
FileOutputStream fos = null;
//File ConfigFile = null;
try{
File configFile = new File("config.properties");
fos = new FileOutputStream(configFile);
Properties propConfig = new Properties();
propConfig.setProperty("article",msg);
propConfig.setProperty("prix",String.valueOf(dnum));
propConfig.store(fos,"restaurant papametre");
fos.close();
}
catch(Exception e){
e.printstacktrace();
}
new Rest().setVisible(true);
this.setVisible(false);
}
private void jTextField3ActionPerformed(java.awt.event.ActionEvent evt) {
// Todo add your handling code here:
}
public static void main(String args[]) {
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(Restparametre.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Restparametre.class.getName()).log(java.util.logging.Level.SEVERE,ex);
} catch (illegalaccessexception ex) {
java.util.logging.Logger.getLogger(Restparametre.class.getName()).log(java.util.logging.Level.SEVERE,ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Restparametre.class.getName()).log(java.util.logging.Level.SEVERE,ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokelater(new Runnable() {
public void run() {
new Restparametre().setVisible(true);
}
});
}
```
解决方法
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