问题
I'm trying to implement a java program which, given a string with linebreaks as input through a simple graphical interface, splits it first at lines, then at spaces, and then for each word has an instruction that tells it what to do with it. I got to something like this:
/*
* 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.
*/
/**
*
* @author michelegorini
*/
import java.util.Scanner;
public class HakkaTranslator extends javax.swing.JFrame {
/**
* Creates new form HakkaTranslator
*/
public HakkaTranslator() {
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() {
inputField = new javax.swing.JTextField();
translateButton = new javax.swing.JButton();
pinyinField = new javax.swing.JLabel();
hakkaCharField = new javax.swing.JLabel();
mandCharField = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
translateButton.setText("Translate");
translateButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
translateButtonActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(hakkaCharField, javax.swing.GroupLayout.PREFERRED_SIZE, 282, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(mandCharField, javax.swing.GroupLayout.PREFERRED_SIZE, 216, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(translateButton, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(inputField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 252, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(pinyinField, javax.swing.GroupLayout.PREFERRED_SIZE, 282, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 0, Short.MAX_VALUE)))
.addContainerGap())
);
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {hakkaCharField, inputField, mandCharField, pinyinField});
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(translateButton)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(pinyinField, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(inputField, javax.swing.GroupLayout.DEFAULT_SIZE, 165, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(hakkaCharField, javax.swing.GroupLayout.PREFERRED_SIZE, 136, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(mandCharField))
.addContainerGap(177, Short.MAX_VALUE))
);
layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {hakkaCharField, inputField, mandCharField, pinyinField});
pack();
}// </editor-fold>
private void translateButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
Scanner kLFeed = new Scanner(System.in).useDelimiter("\\s*\n\\s*");
Scanner kSp = new Scanner(System.in);
String kSpInput;
do{
kSpInput = kLFeed.next();
while(kSp.hasNext(kSpInput)){
translate(kSp.next(kSpInput));
}
translate("\n");
} while(kLFeed.hasNext());
}
private void translate(String word){
pinyinField.setText(pinyinField.getText() + word);
}
/**
* @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(HakkaTranslator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(HakkaTranslator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(HakkaTranslator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(HakkaTranslator.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 HakkaTranslator().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel hakkaCharField;
private javax.swing.JTextField inputField;
private javax.swing.JLabel mandCharField;
private javax.swing.JLabel pinyinField;
private javax.swing.JButton translateButton;
// End of variables declaration
}
Now most of this is auto-generated by the NetBeams IDE. All I actually typed was:
private void translateButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
Scanner kLFeed = new Scanner(System.in).useDelimiter("\\s*\n\\s*");
Scanner kSp = new Scanner(System.in);
String kSpInput;
do{
kSpInput = kLFeed.next();
while(kSp.hasNext(kSpInput)){
translate(kSp.next(kSpInput));
}
translate("\n");
} while(kLFeed.hasNext());
}
private void translate(String word){
pinyinField.setText(pinyinField.getText() + word);
}
save for the translateButtonActionPerformed method opening. Now when I run this, whatever I type in the text field (i.e. with "kin-ha \n"), the program invariably blocks. Is it that I have a slow computer or is there a problem in the code? Perhaps the useDelimiter is wrongly written? I am new to that method. By the way, how do I get a linebreak into that interface? Pressing the return key does nothing.
来源：https://stackoverflow.com/questions/23816019/breaking-an-input-into-words-to-work-on-one-by-one-java