java小程序之JFrame类

淡淡的烟草味﹌ 2022-07-28 01:00 132阅读 0赞

图形用户界面（GUI）组件是OOP很好的例子，开发程序创建图形用户界面，会用到JFrame、JButton、JRadioButton、JComboBox和JList 等java类来创建框架、单选按钮、组合框、列表等。  
下面是一个JFrame类的代码示例：

//GUI JFrame
    import javax.swing.JFrame;
    public class Demo032701{
        public static void main( String [] args ){
            JFrame frame1 = new JFrame();
            frame1.setTitle( "Windows1" );
            frame1.setSize( 800, 450 );
            frame1.setLocation( 200,100 );
            frame1.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
            frame1.setVisible( true );
        }
    }

添加了按钮、标签、文本域、复选框和组合框的GUI，示例代码如下：

//GUI 综合的情况
    import javax.swing.*;
    public class Demo032702{
        public static void main( String [] args ){
            JButton jbtOk = new JButton( "Ok" );
            JButton jbtCancel = new JButton( "Cancel" );
            JLabel jlbName = new JLabel( "enter your name:" );
            JTextField jtfName = new JTextField( "Type your name here" );
            JCheckBox jchkBold = new JCheckBox( "Bold" );
            JCheckBox jchkItalic = new JCheckBox( "Italic" );
            JRadioButton jrbRed = new JRadioButton( "Red" );
            JRadioButton jrbYellow = new JRadioButton( "Yellow" );
            JComboBox jcbColor = new JComboBox( new String[] { "Freshman", "Sophomore", "Junior", "Senior" } );
    
            JPanel panel = new JPanel();
            panel.add( jbtOk );
            panel.add( jbtCancel );
            panel.add( jlbName );
            panel.add( jtfName );
            panel.add( jchkBold );
            panel.add( jchkItalic );
            panel.add( jrbRed );
            panel.add( jrbYellow );
            panel.add( jcbColor );
    
            JFrame frame = new JFrame();
            frame.add( panel );
            frame.setTitle( "show GUI components" );
            frame.setSize( 850,450 );
            frame.setLocation( 200,100 );
            frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
            frame.setVisible( true );
        }
    }