A JLabel object can display text, images, or both. You can specify where the tag contents are aligned in the tag display area by setting vertical and horizontal alignment. By default, labels are vertically centered within their display area. By default, labels that display only text are aligned in the beginning edges; labels that display only images are aligned in the center horizontally. You can also specify the position of text relative to the image. By default, the text is located at the end of the image, and the text and image are aligned vertically.
JLabel() Creates a JLabel with no image and its title is an empty string.
JLabel(Icon image) Creates a JLabel instance with the specified image.
JLabel(Icon image, int horizontalAlignment) Creates a JLabel instance with specified image and horizontal alignment.
JLabel(String text) Creates a JLabel instance with the specified text.
JLabel(String text, Icon icon, int horizontalAlignment) Creates a JLabel instance with specified text, image, and horizontal alignment.
JLabel(String text, int horizontalAlignment) Creates a JLabel instance with specified text and horizontal alignment.
getHorizontalAlignment() Returns the alignment of the label content along the X-axis.
getHorizontalTextPosition() Returns the horizontal position of the label's text relative to its image.
getIcon() Returns the graphic image (glyph, icon) displayed by this label. getText() Returns the text string displayed by this tag.
setHorizontalAlignment(int alignment) Sets the alignment of the label content along the X-axis.
setHorizontalTextPosition(int textPosition) Sets the horizontal position of the label's text relative to its image.
setIcon(Icon icon) Defines the icon to be displayed by this component.
setText(String text) Defines the single line of text to be displayed by this component. setUI(LabelUI ui) Sets the L&F object that renders this component.
setVerticalAlignment(int alignment) Sets the alignment of the label content along the Y axis.
setVerticalTextPosition(int textPosition) Sets the vertical position of the label's text relative to its image.
import java.awt.FlowLayout;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.SwingConstants;public class MixingIconLabel {public static void main(String[] args) {JFrame.setDefaultLookAndFeelDecorated(true);JFrame frame = new JFrame();frame.setTitle("JLabel Test");frame.setLayout(new FlowLayout());frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);ImageIcon imageIcon = new ImageIcon("yourFile.gif");JLabel label = new JLabel("Mixed", imageIcon, SwingConstants.RIGHT);frame.add(label);frame.pack();frame.setVisible(true);}} import javax.swing.JFrame;import javax.swing.JLabel;public class HTMLLabel {public static void main(String[] a) {JFrame frame = new JFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JLabel label = new JLabel("<html>bold <br> plain</html>");frame.add(label);frame.setSize(300, 200);frame.setVisible(true);}} import java.awt.Color;import java.awt.Dimension;import java.awt.Graphics;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.io.Serializable;import javax.swing.JLabel;public class Colors extends JLabel implements Serializable {transient private Color color;// not persistent private Boolean rectangular;// is persistent public Colors() {addMouseListener(new MouseAdapter() {public void mousePressed(MouseEvent me) {change();}});rectangular = false;setSize(200, 100);change();}public Boolean getRectangular() {return rectangular;}public void setRectangular(Boolean flag) {this.rectangular = flag;repaint();}public void change() {color = randomColor();repaint();}private Color randomColor() {int r = (int) (255 * Math.random());int g = (int) (255 * Math.random());int b = (int) (255 * Math.random());return new Color(r, g, b);}public void paint(Graphics g) {Dimension d = getSize();int h = d.height;int w = d.width;g.setColor(color);if (rectangular) {g.fillRect(0, 0, w - 1, h - 1);} else {g.fillOval(0, 0, w - 1, h - 1);}}} import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JScrollPane;public class ScrollPaneFrame {public static void main(String[] args) {JFrame frame = new JFrame();JLabel image = new JLabel(new ImageIcon("A.jpg"));frame.getContentPane().add(new JScrollPane(image));frame.setSize(300, 300);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);}} import java.awt.GridLayout;import javax.swing.JFrame;import javax.swing.JLabel;public class Unicode {public static void main(String args[]) {UnicodeJFrame unicodeJFrame = new UnicodeJFrame();unicodeJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);unicodeJFrame.setSize(350, 250);unicodeJFrame.setVisible(true);}}class UnicodeJFrame extends JFrame {public UnicodeJFrame() {super("Demonstrating Unicode");setLayout(new GridLayout(8, 1));JLabel englishJLabel = new JLabel("/u0057/u0065/u006C/u0063" + "/u006F/u006D/u0065/u0020/u0074/u006F/u0020Unicode/u0021");englishJLabel.setToolTipText("This is English");add(englishJLabel);JLabel chineseJLabel = new JLabel("/u6B22/u8FCE/u4F7F/u7528" + "/u0020/u0020Unicode/u0021");chineseJLabel.setToolTipText("This is Traditional Chinese");add(chineseJLabel);JLabel cyrillicJLabel = new JLabel("/u0414/u043E/u0431/u0440" + "/u043E/u0020/u043F/u043E/u0436/u0430/u043B/u043E/u0432" + "/u0430/u0422/u044A/u0020/u0432/u0020Unicode/u0021");cyrillicJLabel.setToolTipText("This is Russian");add(cyrillicJLabel);JLabel frenchJLabel = new JLabel("/u0042/u0069/u0065/u006E/u0076" + "/u0065/u006E/u0075/u0065/u0020/u0061/u0075/u0020Unicode/u0021");frenchJLabel.setToolTipText("This is French");add(frenchJLabel);JLabel germanJLabel = new JLabel("/u0057/u0069/u006C/u006B/u006F" + "/u006D/u006D/u0065/u006E/u0020/u007A/u0075/u0020Unicode/u0021");germanJLabel.setToolTipText("This is German");add(germanJLabel);JLabel japaneseJLabel = new JLabel("Unicode/u3078/u3087/u3045" + "/u3053/u305D/u0021");japaneseJLabel.setToolTipText("This is Japanese");add(japaneseJLabel);JLabel portugueseJLabel = new JLabel("/u0053/u00E9/u006A/u0061" + "/u0020/u0042/u0065/u006D/u0076/u0069/u006E/u0064/u006F/u0020" + "Unicode/u0021");portugueseJLabel.setToolTipText("This is Portuguese");add(portugueseJLabel);JLabel spanishJLabel = new JLabel("/u0042/u0069/u0065/u006E" + "/u0076/u0065/u006E/u0069/u0064/u0061/u0020/u0061/u0020" + "Unicode/u0021");spanishJLabel.setToolTipText("This is Spanish");add(spanishJLabel);}}The above is the full content of this article about the detailed explanation and usage examples of JLabel of Java programming swing component. I hope it will be helpful to everyone. Interested friends can continue to refer to this site:
" Java Programming Implements Swing Circular Button Example Code "
" A Brief Discussion on Label and JLabel Class Construction Method "
" Detailed explanation of Java graphical interface design container (JFrame) "
If there are any shortcomings, please leave a message to point it out. Thank you friends for your support for this site!