文字列の長さを見つけるプログラムを作成しました。文字列の長さを見つけるプログラムを作成します
この私のコード:
JTInputString = JTextfild (For input)
JLResult = Jlabel (For Show Lenght)
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package UIs;
/**
*
* @author Mr-Enginner
*/
public class String extends javax.swing.JFrame {
/**
* Creates new form String
*/
public String() {
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")
public static void main(java.lang.String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new String().setVisible(true);
}
});
}
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
JTInputString = new javax.swing.JTextField();
JBCalculate = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
JLResult = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
JBCalculate.setText("محاسبه طول رشته");
JBCalculate.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
JBCalculateActionPerformed(evt);
}
});
jLabel1.setText("طول رشته :");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addComponent(JTInputString)
.addContainerGap())
.addGroup(layout.createSequentialGroup()
.addGap(134, 134, 134)
.addComponent(JBCalculate)
.addContainerGap(147, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(JLResult)
.addGap(104, 104, 104)
.addComponent(jLabel1)
.addGap(43, 43, 43))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(45, 45, 45)
.addComponent(JTInputString, javax.swing.GroupLayout.PREFERRED_SIZE, 46, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(JBCalculate)
.addGap(39, 39, 39)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(JLResult))
.addContainerGap(115, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void JBCalculateActionPerformed(java.awt.event.ActionEvent evt) {
Lenght();
Clearform();
}
/**
* @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(String.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(String.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(String.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(String.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 String().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton JBCalculate;
private javax.swing.JLabel JLResult;
private javax.swing.JTextField JTInputString;
private javax.swing.JLabel jLabel1;
// End of variables declaration
public void Lenght(){
String Str=JTInputString.getText();
int str=Str.length();
JLResult.setText(""+str);
}
public void Clearform(){
JTInputString.setText("");
JLResult.setText("");
}
}
と私はこのコードを使用しました。しかし、任意のものを示していない:
java.lang.String Str = JTInputString.getText();
int str = Str.length();
JLResult.setText("" + str);
をしかし、それは私がJLResult
にカウント表示されません。
問題が何ですか?
エラー
スレッドの例外 "AWT-EventQueueの-0" java.lang.RuntimeException:互換性のないソースコード - 互換性のない型:java.lang.Stringでは、UIがでUIs.String に変換することができません。 UIs.String.JBCalculateActionPerformed(String.java:90)のString.Lenght(String.java:137) UIs.String.access $ 000(String.java:12)の のUIs.String $ 2.actionPerformed(String。 java:47) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) at javax.swing.AbstractButton $ Handler.actionPerformed(AbstractButton.j AVA:2348)javax.swing.plaf.basic.BasicButtonListener.mouseReleasedでjavax.swing.DefaultButtonModel.setPressedでjavax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) (DefaultButtonModel.java:259) (AT (Component.java:6533) (javax.swing.JComponent.processMouseEvent(JComponent.java:3324)) (java.awt.Component.processEvent(Component)) のコンポーネントです。 java:6298) at java.awt.Container.processEvent(Container.java:2236) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java: 2294) at java.awt.Component.dispatchEvent(Component.java:4 711) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466) at java.awt.Container.dispatchEventImpl(Container.java:2280) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) at java.awt.EventQueue.access $ 500(EventQueue.java:97) at java.awt.EventQueue $ 3.run(EventQueue.java:709) at java.awt.EventQueue $ 3.run(EventQueue.java:703) at java.security.AccessCont java.awt.EventQueueのすべてjava.security.ProtectionDomain $ JavaSecurityAccessImpl.doIntersectionPrivilegeですべてjava.security.ProtectionDomain $ JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) (ProtectionDomain.java:86) でroller.doPrivileged(ネイティブメソッド) $ 4.run(EventQueue.java:731) at java.awt.EventQueue $ 4.run(EventQueue.java:729) at java.security.AccessController.doPrivileged(ネイティブメソッド) at java.security.ProtectionDomain $ JavaSecurityAccessImpl。 java.awt.EventDispatchThreadでjava.awt.EventDispatchThread.pumpOneEventForFiltersでjava.awt.EventQueue.dispatchEvent(EventQueue.java:728) でdoIntersectionPrivilege(ProtectionDomain.java:76) (EventDispatchThread.java:201) 。java.awt.EventDispatchThread.pumpEventsでjava.awt.EventDispatchThread.pumpEventsでjava.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) でpumpEventsForFilter(EventDispatchThread.java:116) (EventDispatchThread.java:101) ( EventDispatchThread.java:93) java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
私は問題の正確な状況を明確にするために、[MCVE](http://stackoverflow.com/help/mcve)を投稿お勧めします。 – copeg
あなたは冗談だよね?あなたはすでに 'Str.length()'でそれを持っています。 forループは不要です。あなたのメソッドはlengthと呼ばれ、Stringの前にjava.langは必要ないので、変数は小文字で始まる必要があります。希望が助けてくれます:) – ManoDestra
'String str = JTInputString'を使用しているときエラーが表示されます – Kianoush