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This article mainly introduces "how to use JTextField in Java Swing graphical interface tools". In daily operation, I believe that many people have doubts about how to use JTextField in Java Swing graphical interface tools. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts about how to use JTextField in Java Swing graphical interface tools. Next, please follow the editor to study!

Several common construction methods for the JTextField class are as follows:

JTextField () is used to create a default text box

JTextField (String text) is used to create a text box that specifies initialization information (text)

JTextField (int columns) creates a text box with a specified number of columns (colums)

JTextField (String text, int columns) combines the above two to create a text box with initialization information and a specified number of columns.

The specific implementation process:

The first step is to create a window instance object using JFrame

/ / create a window titled "Demo03" JFrame jf = new JFrame ("Demo03"); / / set the coordinates and size of the window jf.setBounds (100100800600); / / set the window to close and launch jf.setDefaultCloseOperation (WindowConstants.EXIT_ON_CLOSE); / / set window visual jf.setVisible (true)

The second step is to add a panel and text box component to the window

/ / create a panel JPanel jp = new JPanel (); / / create a text box JTextField jt1 = new JTextField (); / / add a text box to the panel jp.add (jt1); / / add the panel to the window jf.add (jp)

Step 3, add content to the text box

/ / create a text box JTextField jt1 = new JTextField (); / / set the text content jt1.setText ("this is a normal text box") for the first text box jt1; / / create a second text box with the font and length JTextField jt2 = new JTextField (30) inside; jt2.setFont ("italics", Font.BOLD, 0x12) Jt2.setText ("specified text font and text length within the text box"); / / create a third text box to render JTextField jt3 = new JTextField (45) in centered form; jt3.setText ("Center display"); jt3.setHorizontalAlignment (JTextField.CENTER); / / add the text box to the panel jp.add (jt1) Jp.add (jt2); jp.add (jt3); / / add panels to the window jf.add (jp)

Complete code:

Import javax.swing.*;import java.awt.*;public class Demo01 {public static void main (String [] args) {/ / create a window titled "Demo03" JFrame jf = new JFrame ("Demo03"); / / set the coordinates and size of the window jf.setBounds (100100800600); / / launch jf.setDefaultCloseOperation (WindowConstants.EXIT_ON_CLOSE) when the window is closed / / create a panel JPanel jp = new JPanel (); / / create a text box JTextField jt1 = new JTextField (); / / set the text content jt1.setText for the first text box jt1 ("this is a normal text box"); / / create a second text box and set the font and length inside JTextField jt2 = new JTextField (30) Jt2.setFont (new Font ("Font.BOLD, 0x12"); jt2.setText ("specified text font and text length within the text box"); / / create a third text box that presents JTextField jt3 = new JTextField (45) in centered form; jt3.setText ("centered display"); jt3.setHorizontalAlignment (JTextField.CENTER) / / add text boxes to the panel jp.add (jt1); jp.add (jt2); jp.add (jt3); / / add the panel to the window jf.add (jp); / / set the window visual jf.setVisible (true) }} at this point, the study on "how to use JTextField in Java Swing graphical interface tools" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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