【JAVA语言程序设计基础篇】--图形用户界面基础--Swing GUI组件的公共特性

package chapter12;

import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;

import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.border.LineBorder;//线框
import javax.swing.border.TitledBorder;//标题框

@SuppressWarnings("serial")
public class TestSwingCommonFeatures extends JFrame{
public TestSwingCommonFeatures(){

JPanel p1 = new JPanel (new FlowLayout(FlowLayout.LEFT,2,2));
JButton jbtleft = new JButton("left");
JButton jbtcenter = new JButton("CENTER");
JButton jbtright = new JButton("right");

jbtleft.setBackground(Color.white);
jbtcenter.setForeground(Color.green);
jbtright.setToolTipText("this is the right button");

p1.add(jbtleft);
p1.add(jbtcenter);
p1.add(jbtright);
p1.setBorder(new TitledBorder("three buttons"));
//-------------------------------------//
Font largeFont =new Font ("TimesRoman",Font.BOLD,20);//字体

JPanel p2 = new JPanel (new FlowLayout(FlowLayout.LEFT,5,5));
JButton jbtred = new JButton ("red");
JButton jbtorange = new JButton("orange");
jbtred.setFont(largeFont);
jbtred.setBackground(Color.red);
jbtorange.setForeground(Color.orange);
jbtorange.setToolTipText("this is a orange button");

p2.add(jbtred);
p2.add(jbtorange);
p2.setBorder(new LineBorder(Color.green,4));//被下一行覆盖
p2.setBorder(new TitledBorder("a"));
p2.setLayout(new GridLayout(1,2,1,10));


setLayout(new FlowLayout(FlowLayout.LEFT,30,30));
setLayout(new GridLayout(1,2,5,10));//下一行有一个新的setlayout 这一样的setlayout被覆盖，就不显示了
add(p1);
add(p2);
}

public static void main(String[] args) {
JFrame frame = new TestSwingCommonFeatures();
frame.setTitle("test swing common features");
frame.setSize(500, 150);
frame.setLocationRelativeTo(null);//放中间
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

}

展示

Font 字体

Color 颜色

Border 框