An application that uses a text field and a text area. A search is made in the text area to find an entry from the text field.
Một ứng dụng sử dụng một trường văn bản(text area) và một vùng văn bản(area text field). Một chức năng tìm kiếm sẽ được thực hiện trong vùng văn bản(text area) để tìm một giá trị trong trường văn bản(text field).
TextFieldDemo.java
/*
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle or the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package components;
/*
* TextFieldDemo.java requires one additional file:
* content.txt
*/
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.event.*;
import javax.swing.GroupLayout.*;
public class TextFieldDemo extends JFrame
implements DocumentListener {
private JTextField entry;
private JLabel jLabel1;
private JScrollPane jScrollPane1;
private JLabel status;
private JTextArea textArea;
final static Color HILIT_COLOR = Color.LIGHT_GRAY;
final static Color ERROR_COLOR = Color.PINK;
final static String CANCEL_ACTION = "cancel-search";
final Color entryBg;
final Highlighter hilit;
final Highlighter.HighlightPainter painter;
public TextFieldDemo() {
initComponents();
InputStream in = getClass().getResourceAsStream("content.txt");
try {
textArea.read(new InputStreamReader(in), null);
} catch (IOException e) {
e.printStackTrace();
}
hilit = new DefaultHighlighter();
painter = new DefaultHighlighter.DefaultHighlightPainter(HILIT_COLOR);
textArea.setHighlighter(hilit);
entryBg = entry.getBackground();
entry.getDocument().addDocumentListener(this);
InputMap im = entry.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
ActionMap am = entry.getActionMap();
im.put(KeyStroke.getKeyStroke("ESCAPE"), CANCEL_ACTION);
am.put(CANCEL_ACTION, new CancelAction());
}
/** This method is called from within the constructor to
* initialize the form.
*/
private void initComponents() {
entry = new JTextField();
textArea = new JTextArea();
status = new JLabel();
jLabel1 = new JLabel();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setTitle("TextFieldDemo");
textArea.setColumns(20);
textArea.setLineWrap(true);
textArea.setRows(5);
textArea.setWrapStyleWord(true);
textArea.setEditable(false);
jScrollPane1 = new JScrollPane(textArea);
jLabel1.setText("Enter text to search:");
GroupLayout layout = new GroupLayout(getContentPane());
getContentPane().setLayout(layout);
//Create a parallel group for the horizontal axis
ParallelGroup hGroup = layout.createParallelGroup(GroupLayout.Alignment.LEADING);
//Create a sequential and a parallel groups
SequentialGroup h1 = layout.createSequentialGroup();
ParallelGroup h2 = layout.createParallelGroup(GroupLayout.Alignment.TRAILING);
//Add a container gap to the sequential group h1
h1.addContainerGap();
//Add a scroll pane and a label to the parallel group h2
h2.addComponent(jScrollPane1, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 450, Short.MAX_VALUE);
h2.addComponent(status, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 450, Short.MAX_VALUE);
//Create a sequential group h3
SequentialGroup h3 = layout.createSequentialGroup();
h3.addComponent(jLabel1);
h3.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED);
h3.addComponent(entry, GroupLayout.DEFAULT_SIZE, 321, Short.MAX_VALUE);
//Add the group h3 to the group h2
h2.addGroup(h3);
//Add the group h2 to the group h1
h1.addGroup(h2);
h1.addContainerGap();
//Add the group h1 to the hGroup
hGroup.addGroup(GroupLayout.Alignment.TRAILING, h1);
//Create the horizontal group
layout.setHorizontalGroup(hGroup);
//Create a parallel group for the vertical axis
ParallelGroup vGroup = layout.createParallelGroup(GroupLayout.Alignment.LEADING);
//Create a sequential group v1
SequentialGroup v1 = layout.createSequentialGroup();
//Add a container gap to the sequential group v1
v1.addContainerGap();
//Create a parallel group v2
ParallelGroup v2 = layout.createParallelGroup(GroupLayout.Alignment.BASELINE);
v2.addComponent(jLabel1);
v2.addComponent(entry, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE);
//Add the group v2 tp the group v1
v1.addGroup(v2);
v1.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED);
v1.addComponent(jScrollPane1, GroupLayout.DEFAULT_SIZE, 233, Short.MAX_VALUE);
v1.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED);
v1.addComponent(status);
v1.addContainerGap();
//Add the group v1 to the group vGroup
vGroup.addGroup(v1);
//Create the vertical group
layout.setVerticalGroup(vGroup);
pack();
}
public void search() {
hilit.removeAllHighlights();
String s = entry.getText();
if (s.length() <= 0) {
message("Nothing to search");
return;
}
String content = textArea.getText();
int index = content.indexOf(s, 0);
if (index >= 0) { // match found
try {
int end = index + s.length();
hilit.addHighlight(index, end, painter);
textArea.setCaretPosition(end);
entry.setBackground(entryBg);
message("'" + s + "' found. Press ESC to end search");
} catch (BadLocationException e) {
e.printStackTrace();
}
} else {
entry.setBackground(ERROR_COLOR);
message("'" + s + "' not found. Press ESC to start a new search");
}
}
void message(String msg) {
status.setText(msg);
}
// DocumentListener methods
public void insertUpdate(DocumentEvent ev) {
search();
}
public void removeUpdate(DocumentEvent ev) {
search();
}
public void changedUpdate(DocumentEvent ev) {
}
class CancelAction extends AbstractAction {
public void actionPerformed(ActionEvent ev) {
hilit.removeAllHighlights();
entry.setText("");
entry.setBackground(entryBg);
}
}
public static void main(String args[]) {
//Schedule a job for the event dispatch thread:
//creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
//Turn off metal's use of bold fonts
UIManager.put("swing.boldMetal", Boolean.FALSE);
new TextFieldDemo().setVisible(true);
}
});
}
}
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle or the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package components;
/*
* TextFieldDemo.java requires one additional file:
* content.txt
*/
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.event.*;
import javax.swing.GroupLayout.*;
public class TextFieldDemo extends JFrame
implements DocumentListener {
private JTextField entry;
private JLabel jLabel1;
private JScrollPane jScrollPane1;
private JLabel status;
private JTextArea textArea;
final static Color HILIT_COLOR = Color.LIGHT_GRAY;
final static Color ERROR_COLOR = Color.PINK;
final static String CANCEL_ACTION = "cancel-search";
final Color entryBg;
final Highlighter hilit;
final Highlighter.HighlightPainter painter;
public TextFieldDemo() {
initComponents();
InputStream in = getClass().getResourceAsStream("content.txt");
try {
textArea.read(new InputStreamReader(in), null);
} catch (IOException e) {
e.printStackTrace();
}
hilit = new DefaultHighlighter();
painter = new DefaultHighlighter.DefaultHighlightPainter(HILIT_COLOR);
textArea.setHighlighter(hilit);
entryBg = entry.getBackground();
entry.getDocument().addDocumentListener(this);
InputMap im = entry.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
ActionMap am = entry.getActionMap();
im.put(KeyStroke.getKeyStroke("ESCAPE"), CANCEL_ACTION);
am.put(CANCEL_ACTION, new CancelAction());
}
/** This method is called from within the constructor to
* initialize the form.
*/
private void initComponents() {
entry = new JTextField();
textArea = new JTextArea();
status = new JLabel();
jLabel1 = new JLabel();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setTitle("TextFieldDemo");
textArea.setColumns(20);
textArea.setLineWrap(true);
textArea.setRows(5);
textArea.setWrapStyleWord(true);
textArea.setEditable(false);
jScrollPane1 = new JScrollPane(textArea);
jLabel1.setText("Enter text to search:");
GroupLayout layout = new GroupLayout(getContentPane());
getContentPane().setLayout(layout);
//Create a parallel group for the horizontal axis
ParallelGroup hGroup = layout.createParallelGroup(GroupLayout.Alignment.LEADING);
//Create a sequential and a parallel groups
SequentialGroup h1 = layout.createSequentialGroup();
ParallelGroup h2 = layout.createParallelGroup(GroupLayout.Alignment.TRAILING);
//Add a container gap to the sequential group h1
h1.addContainerGap();
//Add a scroll pane and a label to the parallel group h2
h2.addComponent(jScrollPane1, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 450, Short.MAX_VALUE);
h2.addComponent(status, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 450, Short.MAX_VALUE);
//Create a sequential group h3
SequentialGroup h3 = layout.createSequentialGroup();
h3.addComponent(jLabel1);
h3.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED);
h3.addComponent(entry, GroupLayout.DEFAULT_SIZE, 321, Short.MAX_VALUE);
//Add the group h3 to the group h2
h2.addGroup(h3);
//Add the group h2 to the group h1
h1.addGroup(h2);
h1.addContainerGap();
//Add the group h1 to the hGroup
hGroup.addGroup(GroupLayout.Alignment.TRAILING, h1);
//Create the horizontal group
layout.setHorizontalGroup(hGroup);
//Create a parallel group for the vertical axis
ParallelGroup vGroup = layout.createParallelGroup(GroupLayout.Alignment.LEADING);
//Create a sequential group v1
SequentialGroup v1 = layout.createSequentialGroup();
//Add a container gap to the sequential group v1
v1.addContainerGap();
//Create a parallel group v2
ParallelGroup v2 = layout.createParallelGroup(GroupLayout.Alignment.BASELINE);
v2.addComponent(jLabel1);
v2.addComponent(entry, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE);
//Add the group v2 tp the group v1
v1.addGroup(v2);
v1.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED);
v1.addComponent(jScrollPane1, GroupLayout.DEFAULT_SIZE, 233, Short.MAX_VALUE);
v1.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED);
v1.addComponent(status);
v1.addContainerGap();
//Add the group v1 to the group vGroup
vGroup.addGroup(v1);
//Create the vertical group
layout.setVerticalGroup(vGroup);
pack();
}
public void search() {
hilit.removeAllHighlights();
String s = entry.getText();
if (s.length() <= 0) {
message("Nothing to search");
return;
}
String content = textArea.getText();
int index = content.indexOf(s, 0);
if (index >= 0) { // match found
try {
int end = index + s.length();
hilit.addHighlight(index, end, painter);
textArea.setCaretPosition(end);
entry.setBackground(entryBg);
message("'" + s + "' found. Press ESC to end search");
} catch (BadLocationException e) {
e.printStackTrace();
}
} else {
entry.setBackground(ERROR_COLOR);
message("'" + s + "' not found. Press ESC to start a new search");
}
}
void message(String msg) {
status.setText(msg);
}
// DocumentListener methods
public void insertUpdate(DocumentEvent ev) {
search();
}
public void removeUpdate(DocumentEvent ev) {
search();
}
public void changedUpdate(DocumentEvent ev) {
}
class CancelAction extends AbstractAction {
public void actionPerformed(ActionEvent ev) {
hilit.removeAllHighlights();
entry.setText("");
entry.setBackground(entryBg);
}
}
public static void main(String args[]) {
//Schedule a job for the event dispatch thread:
//creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
//Turn off metal's use of bold fonts
UIManager.put("swing.boldMetal", Boolean.FALSE);
new TextFieldDemo().setVisible(true);
}
});
}
}
Bạn có thể tự một tâp tin content.txt rồi bỏ vào thư mục Class của project hoặc download tập tin sau:
Kết quả - Result
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