How to organize JComponents on top and bottom of JPanel
I have three JButton
s, two JLabel
and one JTextField
in my program and JPanel
s FlowLayout
. I want to arrange three buttons at the beginning JPanel
and the rest at the endJPanel
. I need space between the three buttons and the last three components, but the code doesn't work. Can anyone help me?
This is the code:
JPanel panelMenu=new Jpanel(new FlowLayout())
panelMenu.add ( btnOpen );
panelMenu.add ( lblPage );
panelMenu.add ( txtCurrentPage );
panelMenu.add ( lblTotalPage );
panelMenu.add ( btnBackword );
panelMenu.add ( btnNext );
getContentPanel.add(panelMenu);
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The class FlowLayout
puts components on a string. To get what you want you can use GridBagLayout
.
Sample code:
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class LayoutExamle {
JFrame frame;
JPanel panel;
JButton b1, b2, b3;
JLabel l1, l2;
JTextField t1;
GridBagConstraints constraints;
public LayoutExamle(){
initComp();
}
public void initComp(){
frame = new JFrame("Example");
frame.setLayout(new CardLayout());
panel = new JPanel();
panel.setSize(400, 350);
panel.setLayout(new GridBagLayout());
panel.setBackground(Color.WHITE);
constraints = new GridBagConstraints();
b1 = new JButton("<<");
constraints.gridx = 0;
constraints.gridy = 0;
constraints.gridwidth = 2;
constraints.anchor = GridBagConstraints.NORTHWEST;
constraints.insets = new Insets(12, 43, 0, 0);
panel.add(b1, constraints);
b2 = new JButton("Open");
constraints.gridx = 2;
constraints.gridy = 0;
constraints.gridwidth = 2;
constraints.anchor = GridBagConstraints.NORTHWEST;
constraints.insets = new Insets(12, 18, 0, 0);
panel.add(b2, constraints);
b3 = new JButton(">>");
constraints.gridx = 4;
constraints.gridy = 0;
constraints.anchor = GridBagConstraints.NORTHWEST;
constraints.insets = new Insets(12, 12, 0, 0);
panel.add(b3, constraints);
l1 = new JLabel("jLabel1");
constraints.gridx = 0;
constraints.gridy = 1;
constraints.anchor = GridBagConstraints.NORTHWEST;
constraints.insets = new Insets(234, 43, 12, 0);
panel.add(l1, constraints);
l2 = new JLabel("jLabel1");
l2.setText("jLabel2");
constraints.gridx = 2;
constraints.gridy = 1;
constraints.anchor = GridBagConstraints.NORTHWEST;
constraints.insets = new Insets(234, 18, 12, 0);
panel.add(l2, constraints);
t1 = new JTextField();
constraints.gridx = 4;
constraints.gridy = 1;
constraints.gridwidth = 2;
constraints.ipadx = 130;
constraints.anchor = GridBagConstraints.NORTHWEST;
constraints.insets = new Insets(230, 12, 12, 31);
panel.add(t1, constraints);
frame.add(panel);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static void main(String[] args) {
new LayoutExamle();
}
}
Screenshot:
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