Java SpringLayout

SpringLayout根据一组约束来排列其关联容器的子代, 约束不过是两个组件边缘之间的水平和垂直距离。每个约束都由一个SpringLayout.Constraint对象表示。

SpringLayout容器的每个子容器以及容器本身都具有一组与之关联的约束。

每个边缘位置取决于另一个边缘的位置。如果添加了约束以创建新的边线, 则先前的绑定将被丢弃。 SpringLayout不会自动设置其管理的组件的位置。

嵌套类

领域

有用的方法

例

import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.SpringLayout;
public class MySpringDemo {
	 private static void createAndShowGUI() {
	        JFrame frame = new JFrame("MySpringDemp");
	        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	        Container contentPane = frame.getContentPane();
	        SpringLayout layout = new SpringLayout();
	        contentPane.setLayout(layout);

	        JLabel label = new JLabel("Label: ");
	        JTextField textField = new JTextField("My Text Field", 15);
	        contentPane.add(label);
	        contentPane.add(textField);
	 
	        layout.putConstraint(SpringLayout.WEST, label, 6, SpringLayout.WEST, contentPane);
	        layout.putConstraint(SpringLayout.NORTH, label, 6, SpringLayout.NORTH, contentPane);
	        layout.putConstraint(SpringLayout.WEST, textField, 6, SpringLayout.EAST, label);
	        layout.putConstraint(SpringLayout.NORTH, textField, 6, SpringLayout.NORTH, contentPane);
	        layout.putConstraint(SpringLayout.EAST, contentPane, 6, SpringLayout.EAST, textField);
	        layout.putConstraint(SpringLayout.SOUTH, contentPane, 6, SpringLayout.SOUTH, textField);

	        frame.pack();
	        frame.setVisible(true);
	    }
	    public static void main(String[] args) {
	        javax.swing.SwingUtilities.invokeLater(new Runnable() {
	            public void run() {
	                createAndShowGUI();
	            }
	        });
	    }
	}

输出：