Java spring layout manager usage tutorial
This article mainly introduces the detailed explanation of the use of Java spring layout manager. Friends in need can refer to it
The layout manager implemented by the SpringLayout class is called the spring layout manager. Use this layout manager to manage components. When the size of the form is changed, the size of the components can be automatically adjusted without changing the relative positions between components, so that the components still fill the entire form, thus ensuring the overall effect of the form. Next, let’s take a look at the usage and effects of the spring layout manager through an example.
Spring Layout Manager can manage the layout of components by establishing constraints on the edges of containers and components. Constraints can be established between each edge through the method putConstraint(String e1,Conponet c1,int pad,String e2,Component c2). The entry parameters of this method are described as follows:
c1: The component object that needs to be referenced;
c2: The specific edge of the component object that needs to be referenced;
e1: The referenced component object;
e2: The specific edge of the referenced component object Reference side;
pad: the distance between two sides, that is, the spacing between two components.
It’s a bit confusing, but it’s actually easy to understand.
Example 1: Using spring layout manager.
This example uses the spring layout manager to implement the form. After adjusting the size of the form, the components will still fill the entire form, and the relative positions between components will not change. Source code:
import java.awt.Container; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.Spring; import javax.swing.SpringLayout; public class SpringLayout_3 extends JFrame { private static final long serialVersionUID = -6045918631932051025L; public SpringLayout_3() { // TODO Auto-generated constructor stub Container container = getContentPane(); SpringLayout springLayout = new SpringLayout(); container.setLayout(springLayout); JLabel topicLabel = new JLabel("主题 :"); JLabel contentLabel = new JLabel("内容 :"); final JTextField textField = new JTextField(30); JTextArea textArea = new JTextArea(3, 30); JScrollPane scrollPane = new JScrollPane(); scrollPane.setViewportView(textArea); textArea.setLineWrap(true); final JButton confirmButton = new JButton("取消"); JButton cancelButton = new JButton("确认"); Spring st = Spring.constant(10); Spring st2 = Spring.constant(30); container.add(topicLabel); springLayout.putConstraint(SpringLayout.NORTH, topicLabel, st, SpringLayout.NORTH, container); springLayout.putConstraint(SpringLayout.WEST, topicLabel, st, SpringLayout.WEST, container); container.add(textField); springLayout.putConstraint(SpringLayout.WEST, textField, st2, SpringLayout.EAST, topicLabel); springLayout.putConstraint(SpringLayout.NORTH, textField, 0, SpringLayout.NORTH, topicLabel); springLayout.putConstraint(SpringLayout.EAST, textField, Spring.minus(st), SpringLayout.EAST, container); container.add(contentLabel); springLayout.putConstraint(SpringLayout.WEST, contentLabel, 0, SpringLayout.WEST, topicLabel); springLayout.putConstraint(SpringLayout.NORTH, contentLabel, st, SpringLayout.SOUTH, topicLabel); container.add(scrollPane); springLayout.putConstraint(SpringLayout.NORTH, scrollPane, 0, SpringLayout.NORTH, contentLabel); springLayout.putConstraint(SpringLayout.WEST, scrollPane, 0, SpringLayout.WEST, textField); springLayout.putConstraint(SpringLayout.EAST, scrollPane, Spring.minus(st), SpringLayout.EAST, container); container.add(confirmButton); springLayout.putConstraint(SpringLayout.SOUTH, scrollPane, Spring.minus(st), SpringLayout.NORTH, confirmButton); springLayout.putConstraint(SpringLayout.EAST, confirmButton, Spring.minus(st), SpringLayout.EAST, container); springLayout.putConstraint(SpringLayout.SOUTH, confirmButton, Spring.minus(st), SpringLayout.SOUTH, container); container.add(cancelButton); springLayout.putConstraint(SpringLayout.EAST, cancelButton, Spring.minus(st), SpringLayout.WEST, confirmButton); springLayout.putConstraint(SpringLayout.NORTH, cancelButton, 0, SpringLayout.NORTH, confirmButton); // make the text field focused every time the window is activated addWindowFocusListener(new WindowAdapter() { @Override public void windowGainedFocus(WindowEvent e) { // TODO Auto-generated method stub textField.requestFocus(); } }); } public static void main(String[] args) { // TODO Auto-generated method stub SpringLayout_3 frame = new SpringLayout_3(); frame.setTitle("使用弹簧布局管理器"); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setBounds(100, 100, 600, 300); } }
The above is the detailed content of Java spring layout manager usage tutorial. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Guide to Square Root in Java. Here we discuss how Square Root works in Java with example and its code implementation respectively.

Guide to Perfect Number in Java. Here we discuss the Definition, How to check Perfect number in Java?, examples with code implementation.

Guide to Random Number Generator in Java. Here we discuss Functions in Java with examples and two different Generators with ther examples.

Guide to Weka in Java. Here we discuss the Introduction, how to use weka java, the type of platform, and advantages with examples.

Guide to the Armstrong Number in Java. Here we discuss an introduction to Armstrong's number in java along with some of the code.

Guide to Smith Number in Java. Here we discuss the Definition, How to check smith number in Java? example with code implementation.

In this article, we have kept the most asked Java Spring Interview Questions with their detailed answers. So that you can crack the interview.

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is
