Jlabel、setVisible、JRadioButton、

1、JLabel lblNewLabel = new JLabel("New label");// 利用JLabel组件插入图片

lblNewLabel.setIcon(new ImageIcon("D:\\Desktop\\887384.JPG"));

2、new DengLu().setVisible(true);     //跳转到DengLu页面

3、textField_4.setText(textField_3.getText());  //textField_4显示textField_3中的内容
int a=Integer.parseInt(textField_4.getText());
int b=Integer.parseInt(textField_7.getText());//字符转整形
int c=b-a;
//String.valueOf(c);//整型转字符串
textField_8.setText((String.valueOf(c)));//

4、//单选框的实现

JRadioButton rdbtnNewRadioButton = new JRadioButton("微信登录");
rdbtnNewRadioButton.setBounds(29, 169, 121, 23);
contentPane.add(rdbtnNewRadioButton);

JRadioButton rdbtnNewRadioButton_1 = new JRadioButton("qq登录");
rdbtnNewRadioButton_1.setBounds(147, 169, 121, 23);
contentPane.add(rdbtnNewRadioButton_1);


ButtonGroup group=new ButtonGroup();

group.add(rdbtnNewRadioButton);
group.add(rdbtnNewRadioButton_1);