NumericTextField.java

/*
 * Copyright (c) 2007 BUSINESS OBJECTS SOFTWARE LIMITED
 * 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 Business Objects nor 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.
 */


/*
 * NumericTextField.java
 * Created: Oct 1, 2004
 * By: ??
 */
package org.openquark.util.ui;

import javax.swing.InputVerifier;
import javax.swing.JComponent;
import javax.swing.JTextField;

/**
 * A subclass of JTextField that only allows the user to enter numbers.
 */
public class NumericTextField extends JTextField {

    private static final long serialVersionUID = -1143863704273395095L;

    /**
     * Use this method to create a <code>JTextField</code> that only accepts
     * integer input.
     * @return JTextField
     */
    public static JTextField createIntegerTextField() {
        JTextField textField = new NumericTextField();
        textField.setInputVerifier(new InputVerifier() {
            @Override
            public boolean verify(JComponent input) {
                try {
                    Integer.parseInt(((JTextField) input).getText());
                    return true;
                } catch (NumberFormatException nfe) {
                    return false;
                }
            }
        });
        return textField;
    }
    
    /**
     * Use this method to create a <code>JTextField</code> that accepts integer
     * or decimal input.
     * @return JTextField
     */
    public static JTextField createDecimalTextField() {
        JTextField textField = new NumericTextField();
        textField.setInputVerifier(new InputVerifier() {
            @Override
            public boolean verify(JComponent input) {
                try {
                    Double.parseDouble(((JTextField) input).getText());
                    return true;
                } catch (NumberFormatException nfe) {
                    return false;
                }
            }
        });
        return textField;
    }
    
}