java布局之BoxLayout

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BoxLayout和FlowLayout有点类似，不过BoxLayout既可以横向排列组件，又设置为纵向排列组件，所以它的功能比FlowLayout强大。它总共有四种约束方式

X_AXIS，Y_AXIS，LINE_AXIS，PAGE_AXIS

X_AXIS：组件从左到右横向排列

Y_AXIS：组件从上到下纵向排列

LINE_AXIS：按照行的方式排列，可以从左到右也可以从右到左

PAGE_AXIS：按照页面的方式排列

/* * BoxLayoutDemo.java requires no other files. */ import java.awt.Component;import java.awt.Container;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel; public class BoxLayouts extends JFrame{private JButton btn1 = new JButton("Button1");private JButton btn2 = new JButton("Button2");private JButton btn3 = new JButton("Button3 what a fine day");private JButton btn4 = new JButton("Button4 what a fine da");private JButton btn5 = new JButton("Button5 what a fine d");private JButton btn6 = new JButton("Button6 what a fines");BoxLayouts(){super();initComponent();}private void initComponent(){Container container = this.getContentPane();container.setLayout(new BoxLayout(container,BoxLayout.PAGE_AXIS));container.add(btn1);container.add(btn2);container.add(btn3);container.add(btn4);container.add(btn5);container.add(btn6);}public static void main(String[] args){BoxLayouts frame = new BoxLayouts();frame.pack();frame.setVisible(true);}}

图1 Y_AXIS

图2 X_AXIS

图3 LINE_AXIS

这里设置了组件的朝向，代码如下所示：

private void initComponent(){Container container = this.getContentPane();container.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);container.setLayout(new BoxLayout(container,BoxLayout.LINE_AXIS));container.add(btn1);container.add(btn2);container.add(btn3);container.add(btn4);container.add(btn5);container.add(btn6);}

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