Java JTextField addPlaceHolder(final JTextField field, final String placeHolderText)

Description

add Place Holder

License

Apache License

Declaration

public static void addPlaceHolder(final JTextField field, final String placeHolderText) 

Method Source Code

//package com.java2s;
/*/*from   ww w. ja v a2 s .  com*/
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */

import java.awt.Color;

import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

import javax.swing.JTextField;

public class Main {
    public static void addPlaceHolder(final JTextField field, final String placeHolderText) {
        field.addFocusListener(new FocusListener() {
            private Color fontColor = field.getForeground();
            //          private String previousText=field.getText();

            public void focusGained(FocusEvent arg0) {
                if (field.getText().equals(placeHolderText)) {
                    field.setText("");
                }
                field.setForeground(fontColor);
            }

            public void focusLost(FocusEvent arg0) {
                if (field.getText().trim().equals("")) {
                    fontColor = field.getForeground();
                    field.setForeground(Color.GRAY);
                    field.setText(placeHolderText);
                }
            }
        });
        if (field.getText().trim().equals("")) {
            field.setText(placeHolderText);
            field.setForeground(Color.GRAY);
        }
    }
}

Related

1. addHighlight(JTextField label, MouseEvent mouseEvent1, MouseEvent mouseEvent2)
2. addInputValidator(final DocumentListener inputValidator, final JTextField... textFields)
3. addLabelTextRows(JLabel[] labels, JTextField[] textFields, GridBagLayout gridbag, Container container)
4. addStyle(JTextField textField, String labelName)
5. adjustTextToRight(JTextField textField)
6. applyDefaultProperties(final JTextField comp)
7. AreAllTextFieldsFilled(javax.swing.JTextField[] tfs)