BoxLayout in Java Swing Example

The BoxLayout layout manager is similar to FlowLayout in that, the components are placed in the order in which they are added and each component gets to have its own size. But unlike FlowLayout, the BoxLayout layout manager arranges components in either a single row or a single column. In other words, the components you add to BoxLayout are added vertically from top to bottom or horizontally from left to right. In BoxLayout, components will not continue on the next line or columns when there is insufficient room. The components that are out of range will not be shown. This layout manager is useful for creating toolbars or vertical button bars.

The constructor used for creating BoxLayout layout manager is

BoxLayout(java.awt.Container target, int axis}

It creates a layout manager that will layout components either left to right or top to bottom as specified in the axis parameter. The parameter target is a reference to the container to which layout manager applies and the parameter axis is a constant value that can be either BoxLayout.X_AXIS for left to right layout or Boxlayout.Y_AXIS for top to bottom layout.

                       Constructors and methods in the BoxLayout class.

Program demonstrates the JBoxLayout class:

import javax.swing.*; 
 import java.awt.*; 
 class BoxLayoutExample extends JFrame 
 { 
     JButton [] Buttons; 
     BoxLayoutExample() 
     { 
        int i; 
        Container c = getContentPane(); 
        setLayout(new BoxLayout(c,BoxLayout.Y_AXIS)); 
        JButton Btnfirst = new JButton("C"); 
        JButton BtnSecond = new JButton("C++"); 
        JButton BtnThird= new JButton("Visual Basic"); 
        JButton Btnfour = new JButton("Java"); 
        add(Btnfirst);add(BtnSecond);add(BtnThird);add(Btnfour); 
     } 
 } 
   class BoxLayoutJavaExample 
   { 
       public static void main(String args[]) 
      { 
          BoxLayoutExample frame = new BoxLayoutExample(); 
          frame.setTitle("BoxLayout Java Example"); 
          frame.setBounds(200,250,200,200); 
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
          frame.setVisible(true); 
      } 
   }