Question

this is my code
package pack;
import java.awt.*;
import javax.swing.*;
public class MySwing
{
MySwing()
{

    JFrame.setDefaultLookAndFeelDecorated(true);
JFrame f = new JFrame("This is my Frame");
JTabbedPane jtb= new JTabbedPane();
JPanel p1 = new JPanel();
JPanel p2 = new JPanel();
JPanel p3 = new JPanel();jtb.addTab("employee Info", p1);
jtb.addTab("employee Dept", p2); jtb.addTab("employee Salary", p3);
f.add(jtb);
JLabel l = new JLabel("User Name");
l.setForeground(Color.blue);
JTextField tf = new JTextField(20); tf.setFont(new Font("Coronet",Font.BOLD,20));
tf.setHorizontalAlignment(JTextField.RIGHT); tf.setBackground(Color.black);
tf.setForeground(Color.yellow);
JLabel l1 = new JLabel("Password: ");
JPasswordField pf = new JPasswordField(20);
JTextArea ta = new JTextArea(10,20);
JScrollPane sp = new JScrollPane(ta); 
String str[]={"select the city","Noida","Delhi","Faridabad"};
JComboBox c= new JComboBox(str);
JList li = new JList(str);
JCheckBox cb1= new JCheckBox("I.Sc",true);
JCheckBox cb2= new JCheckBox("B.Sc"); JCheckBox cb3= new JCheckBox("M.Sc");

    ButtonGroup cbg = new ButtonGroup(); JRadioButton cb4= new JRadioButton("Male",true);
JRadioButton cb5= new JRadioButton("Female",false);
cbg.add(cb4);cbg.add(cb5);
JButton b = new JButton("save");
p1.add(l);p1.add(tf);p1.add(l1);p1.add(pf);p2.add(sp);p2.add(c);p2.add(li);p2.add(cb1);p2.add(cb2);p2.add(cb3);
p3.add(cb4);p3.add(cb5);p3.add(b);
f.setSize(600,400); f.setLocation(200,100);
f.setVisible(true); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String arg[])
{

    new MySwing();
}
}

这是问题所在 MySwing.java使用未经检查或不安全的操作使用-xlint重新编译：取消选中以获取详细信息帮我解决这个问题这不是错误但是我的系统没有运行它解决它

Answer 1

首先你可以做

JComboBox<String> c= new JComboBox<String> (str);
JList<String> li = new JList<String>(str);

了解泛型

如何解决这个问题？

1 个答案: