Java使用或覆蓋棄用的API

Question

我已經爲我的項目編寫了代碼，並且在編譯時收到警告消息。我無法運行它。嘗試了許多可能的方法，如忽略警告等，我仍然無法運行它。下面你會找到代碼。

import javax.swing.*; 
import java.awt.*; 
    import java.awt.event.*; 
import java.io.*; 
import java.net.*; 
import java.util.*; 
import javax.swing.event.*; 
import java.sql.*; 

    class NymbleServer extends JFrame 
{ 
JLabel jl1; 
JLabel jl2; 


JButton jb1; 
JButton jb2; 

JTextField jt1; 
JPasswordField jt2; 
String msg=""; 


Container c; 
ImageIcon ii; 
ImageIcon i2; 
JLabel jl4; 
JLabel jl6; 


String str=""; 
String pass=""; 
String path=""; 
String coreaddr=""; 
String core=""; 
String nextcore=""; 
String dest=""; 
String dest1=""; 
File f; 
File fgs; 
Vector v = new Vector(); 

NymbleServer() 

{ 

    jl1=new JLabel("Nymble Server Name "); 
    jl2=new JLabel("Server Key "); 


    jb1=new JButton("Send"); 
    jb2=new JButton("Reset"); 

    jt1=new JTextField(10); 
    jt2=new JPasswordField(10); 
    ii=new ImageIcon("nymbleserver.png"); 
    i2=new ImageIcon("nymbleserver1.PNG"); 
    jl4=new JLabel(ii); 
    jl6=new JLabel(i2); 

    c = getContentPane(); 
    c.setLayout(null); 
    c.setBackground(new Color(0,0,120)); 
    c.show(); 
    c.add(jl1); 
    c.add(jt1); 
    c.add(jl2); 
    c.add(jb1); 
    c.add(jb2); 
    c.add(jl4); 
    c.add(jl6); 
    c.add(jt2); 

     addWindowListener(new java.awt.event.WindowAdapter() { 
     public void windowClosing(java.awt.event.WindowEvent evt) { 
      exitForm(evt); 
     } 
    }); 





    jl4.setBounds(30,20,728,68); 
    jl1.setBounds(20,110,200,25); 
    jt1.setBounds(150,110,100,25); 
    jl2.setBounds(50,145,200,25); 
    jt2.setBounds(150,145,100,25); 
    jb1.setBounds(70,235,100,25); 
    jb2.setBounds(180,235,100,25); 
    jl6.setBounds(300,105,485,309); 




    setSize(800,500); 
    setVisible(true); 
    setTitle("Server"); 





    jb1.addActionListener(new ActionListener() { 

     public void actionPerformed(ActionEvent ae) 
     { 


      try { 

    if(!jt1.getText().equals("") && !jt2.getText().equals("")){ 

     JOptionPane.showMessageDialog (null, "Authorised User", "Login 

Seccess", JOptionPane.INFORMATION_MESSAGE); 

     VerifAdminLogin(); 

     } 
     else 
     JOptionPane.showMessageDialog((Component) null, 

     "Invalid password. Please try again. ", "Login Error", 

     JOptionPane.INFORMATION_MESSAGE); 

     } 
     catch(Exception e) { System.out.println(e); 
     } 

     } 
    }); 



    jb2.addActionListener(new ActionListener() { 

     public void actionPerformed(ActionEvent ae) 
     { 
     jt1.setText(""); 
     jt2.setText(""); 
     } 
     }); 



    } 

    private void exitForm(java.awt.event.WindowEvent evt) 
    { 
    dispose(); 
    } 

public static void main(String a[]) 

{ 
    new FileOpen(); 
} 

void VerifAdminLogin() 
    { 
      Connection con=null; 
      String url="jdbc:odbc:nymble"; 
      Statement st=null; 

      try 
      { 

        String val1=jt1.getText(); 
        val1 = val1.trim(); 
        String val2 = 

      (String)jt2.getText(); 
        val2 = val2.trim();    



       Class.forName 

       ("sun.jdbc.odbc.JdbcOdbcDriver"); 

       con=DriverManager.getConnection(url); 

       st = con.createStatement(); 


      ResultSet rs=st.executeQuery("Select Key from 

       Server where SerName='"+val1+"'"); 

      while(rs.next()){ 
       String user = rs.getString(1); 

       boolean b=user.equals(val2);    



       if(b) 
       { 

        new Server().setVisible(true); 
      } 
       else 
       { 
        JOptionPane.showMessageDialog 

      ((Component) null, "Invalid password. Please try again. ", "Login Error", 

      JOptionPane.INFORMATION_MESSAGE); 
        jt1.setText(""); 
        jt2.requestFocus(); 
       } 
       } 
      } 
      catch(SQLException ex) 
      { 
      System.out.println("Unable to access the database"); 
      } 
      catch(ClassNotFoundException ex) 
      { 
      System.out.println("Class not found"); 
      } 
      catch(Exception ex) 
      { 
      System.out.println("Exception raised is:"+ex); 
      } 
      finally { 
      con=null; 
      } 
    } 

     } 

Answer 1

只需更換

new PseudonymManager().show(); 

與

new PseudonymManager().setVisible(true); 

方法Show（）被廢棄了，因爲Java 1.5的，所以就先Java文檔下一次;）