將靜態類引用傳遞給非靜態類的構造函數

Question

我需要引用客戶端，因爲我需要調用setWinTitle來更改當前窗口的標題。如何解決它？

public class Client { 
     public static void main(String[] args){ 
      JPanel gui= startGUI(); 
      ... 
     } 

     private static JPanel startGUI(){ 
      f = new JFrame(); 
      JPanel gui = new JPanel(this); // error 
     } 

     public void setWinTitle(String tite){ 
      f.setTitle(tite); 
     } 
    } 

---

public class JPanel extends javax.swing.JPanel { 
    Client client; 

    public JPanel(Client cl) { 
     client= cl; 
     initComponents(); 
    } 
... 
} 

Answer 1

您需要創建的Client一個實例：

JPanel gui = new JPanel(new Client());