我应该从GUI制作库存程序。我的代码到目前为止可以打开文件。但是，我现在需要这样做，它只显示符合条件的文件。主要问题是文本文件以一种奇怪的方式排序，这是解码所必需的。
所以如果我要把：宝马放在制造领域，21123代表序列号，消声器代表名称，119.99代表价格，0代表股票。我应该在文本区域中获得前5行。
如何从各种文本字段中查找某个条件并从文本文件中显示匹配项？
BMW
Muffler
21123
119.99
0
Chevy
Muffler
20911
52.99
2
Ford
Muffler
26854
129.59
2
Honda
Muffler
23319
159.99
2
Toyota
Muffler
27813
199.29
1
BMW
Catalytic Converter
900122
132.33
2
Chevy
Catalytic Converter
902391
69.59
1
Ford
Catalytic Converter
905778
61.23
4
package lib;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class Show extends javax.swing.JFrame {
/**
* Creates new form Show
*/
public Show() {
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() {
FileName = new javax.swing.JTextField();
name = new javax.swing.JTextField();
serialNumber = new javax.swing.JTextField();
price = new javax.swing.JTextField();
onHand = new javax.swing.JTextField();
make = new javax.swing.JTextField();
jScrollPane1 = new javax.swing.JScrollPane();
display = new javax.swing.JTextArea();
open = new javax.swing.JButton();
save = new javax.swing.JButton();
find = new javax.swing.JButton();
Clear = new javax.swing.JButton();
FileLabel = new javax.swing.JLabel();
nameLabel = new javax.swing.JLabel();
serialNumberLabel = new javax.swing.JLabel();
PriceLabel = new javax.swing.JLabel();
InstockLabel = new javax.swing.JLabel();
makeLabel = new javax.swing.JLabel();
Update = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
FileName.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
FileNameActionPerformed(evt);
}
});
name.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
nameActionPerformed(evt);
}
});
serialNumber.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
serialNumberActionPerformed(evt);
}
});
display.setColumns(20);
display.setRows(5);
jScrollPane1.setViewportView(display);
display.setEditable(false);
open.setText("Open");
open.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
openActionPerformed(evt);
}
});
save.setText("Save");
find.setText("Find");
find.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
findActionPerformed(evt);
}
});
Clear.setText("Clear");
Clear.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
ClearActionPerformed(evt);
}
});
FileLabel.setText("File Name");
nameLabel.setText("Name");
serialNumberLabel.setText("serial Number");
PriceLabel.setText("Price");
InstockLabel.setText("In Stock:");
makeLabel.setText("Make");
Update.setText("Update");
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()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addComponent(FileLabel)
.addGap(18, 18, 18)
.addComponent(FileName, javax.swing.GroupLayout.DEFAULT_SIZE, 102, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(nameLabel)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(serialNumberLabel, javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(PriceLabel))
.addComponent(InstockLabel)
.addComponent(makeLabel))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(serialNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(name)
.addComponent(price, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(onHand, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(make, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addGap(18, 18, Short.MAX_VALUE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 227, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addComponent(open)
.addGap(18, 18, 18)
.addComponent(save)
.addGap(18, 18, 18)
.addComponent(find)
.addGap(18, 18, 18)
.addComponent(Clear)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(Update)
.addGap(0, 0, Short.MAX_VALUE)))
.addContainerGap())
);
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {FileName, make, name, onHand, price, serialNumber});
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(34, 34, 34)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 144, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(27, 27, 27)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(FileLabel)
.addComponent(FileName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(name, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(nameLabel))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(serialNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(serialNumberLabel))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(price, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(PriceLabel))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(onHand, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(InstockLabel))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(make, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(makeLabel))))
.addGap(38, 38, 38)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(open)
.addComponent(save)
.addComponent(find)
.addComponent(Clear)
.addComponent(Update))
.addContainerGap(57, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void FileNameActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void nameActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void serialNumberActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void ClearActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
FileName.setText("");
name.setText("");
serialNumber.setText("");
price.setText("");
onHand.setText("");
make.setText("");
display.setText("");
}
private void openActionPerformed(java.awt.event.ActionEvent evt) {
try {
File file = new File(FileName.getText());
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
StringBuffer stringBuffer = new StringBuffer();
String line;
int i=0;
while ((line = bufferedReader.readLine()) != null) {
stringBuffer.append(line+" ");
if(i==4){
stringBuffer.append("\n");
i =-1;
}
i++;
}
fileReader.close();
display.setText(display.getText() + stringBuffer.toString());
} catch (IOException e) {
display.setText("Error 101: File Not Found! ");
}
}
private void findActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @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(Show.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Show.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Show.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Show.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 Show().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton Clear;
private javax.swing.JLabel FileLabel;
private javax.swing.JTextField FileName;
private javax.swing.JLabel InstockLabel;
private javax.swing.JLabel PriceLabel;
private javax.swing.JButton Update;
private javax.swing.JTextArea display;
private javax.swing.JButton find;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextField make;
private javax.swing.JLabel makeLabel;
private javax.swing.JTextField name;
private javax.swing.JLabel nameLabel;
private javax.swing.JTextField onHand;
private javax.swing.JButton open;
private javax.swing.JTextField price;
private javax.swing.JButton save;
private javax.swing.JTextField serialNumber;
private javax.swing.JLabel serialNumberLabel;
// End of variables declaration
}
答案 0 :(得分：1)
JTable和RowSorter应该是一个很好的解决方案。
也许某些代码也很有用。
public void search() {
String s = tf.getText();
String content = textArea.getText(); // instead from a file
int index = content.indexOf(s, 0);
if (index >= 0) {
try {
int end = index + s.length();
// do something
}
}