Java JFrame.setSize (x, y) not working?
When I execute this bit of code, a tiny window appears, and inside it is about 116x63 and the whole size includes a ~ 140x100 border. How do I customize the interior for what I need?
public static void graphics() {
JFrame frame = new JFrame();
String title = "test window";
frame.setTitle(title);
frame.setSize(gridRow, gridCol); //101 x 101
frame.setResizable(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
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1 answer
- Create a custom component extending from
JPanel
, override its methodgetPreferredSize
to return the window size you would like. - Either add this to your frame or set it as the frame's content pane.
- Call
pack
in frame
Updated with example
On my pc Frame size = java.awt.Dimension[width=216,height=238]
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestFrameSize01 {
public static void main(String[] args) {
new TestFrameSize01();
}
public TestFrameSize01() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
System.out.println("Frame size = " + frame.getSize());
}
});
}
public class TestPane extends JPanel {
public TestPane() {
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
String text = getWidth() + "x" + getHeight();
FontMetrics fm = g2d.getFontMetrics();
int x = (getWidth() - fm.stringWidth(text)) / 2;
int y = ((getHeight() - fm.getHeight()) / 2) + fm.getAscent();
g2d.drawString(text, x, y);
g2d.dispose();
}
}
}
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