new FlowLayout(FlowLayout.LEFT);new FlowLayout(FlowLayout.CENTER);new FlowLayout(FlowLayout.RIGHT);
package flowlayout;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.*;
public class FlowLayout可以居左居中居右 {
static Frame frame = new Frame(Thread.currentThread().getStackTrace()[1].getClassName());
static {
frame.addWindowListener(new WindowAdapter() {
@Override public void windowClosing(WindowEvent event) { System.exit(0); }
});
frame.setBounds(100, 100, 1600, 800);
GridLayout layoutRoot = new GridLayout(0, 1); frame.setLayout(layoutRoot);
}
public static void main(String[] arguments)throws Exception{
f1(1); f1(10); f1(100);
frame.setVisible(true);
}
static void f1(int quantity) {
GridLayout gridLayoutA = new GridLayout(0, 3, 0, 0);
Panel panelZ1 = new Panel(gridLayoutA); frame.add(panelZ1);
FlowLayout flowLayoutZ2Left = new FlowLayout(FlowLayout.LEFT);
Panel panelZ2Left = new Panel(flowLayoutZ2Left); panelZ1.add(panelZ2Left);
panelZ2Left.setBackground(new Color((int)(Math.random()*256*256*256)));
FlowLayout flowLayoutZ2Center = new FlowLayout(FlowLayout.CENTER);
Panel panelZ2Center = new Panel(flowLayoutZ2Center); panelZ1.add(panelZ2Center);
panelZ2Center.setBackground(new Color((int)(Math.random()*256*256*256)));
FlowLayout flowLayoutZ2Right = new FlowLayout(FlowLayout.RIGHT);
JPanel panelZ2Right = new JPanel(flowLayoutZ2Right); panelZ1.add(panelZ2Right);
panelZ2Right.setBackground(new Color((int)(Math.random()*256*256*256)));
for(int i=0; i<quantity; i++) {
String h = """
<html><head><style>
body{font-size:16px; }
</style></head><body>
"""
+
"<b style='font-size:16px; background-color:yellow;'>"+String.valueOf(i)+"</b>"
+"</body></html>";
JLabel jlabel = new JLabel(h); jlabel.setOpaque(true); jlabel.setBackground(Color.GREEN);
panelZ2Left.add(jlabel);
jlabel = new JLabel(h); jlabel.setOpaque(true); jlabel.setBackground(Color.GREEN);
panelZ2Center.add(jlabel);
jlabel = new JLabel(h); jlabel.setOpaque(true); jlabel.setBackground(Color.GREEN);
panelZ2Right.add(jlabel);
}
}
}
