JTextField中如何在文本

Question

看在我的GUI.java類，我有以下功能：

public void setChat(String text) 
{ 
    chat.append(text); 
} 

public void getInput(String text) 
{ 
    String read = input.getText(); 
} 

我想用我的getInput（）方法來設置我將使用剩下的用戶名我的代碼，但我似乎無法正確從我的Client.java中的TextField中讀取它。我在獲取原件時遇到了很多問題：

字符串username = gui.getInput（）;

（這當然也沒有工作）。有人可以幫我閱讀一個TextField條目並將其分配給我的用戶名字符串？

import java.io.*; 
import java.net.*; 

public class Client 
{  
    public static void main(String [] args) throws IOException 
    { 
    GUI gui = new GUI(); 
    javax.swing.SwingUtilities.invokeLater(new Runnable() 
    { 
    public void run() 
    { 
     //GUI gui = new GUI(); 
    } 
    }); 

    String username = "";  
    gui.setChat(" Enter the username you would like to use for the duration of the chat session.\n"); 
    if (username == "") 
    { 
    System.out.println("Press Any Key To Continue..."); 
    new java.util.Scanner(System.in).nextLine(); 
    gui.getInput(username); 
    gui.setChat(" Your username is now: " + username + ".\n"); 
    } 
} 
} 

---

EDIT 1

GUI.java類：

String getInput(String text) 
{ 
    return input.getText(); 
} 

Client.java類：

String username; 
    gui.setChat(" Enter the username you would like to use for the duration of the chat session.\n"); 
    username = gui.getInput(); 

    System.out.println("Press Any Key To Continue..."); 
    new java.util.Scanner(System.in).nextLine(); 
    gui.setChat(" Your username is now: " + username + ".\n"); 

錯誤：

Client.java:19: error: method getInput in class GUI cannot be applied to given types; 
    username = gui.getInput(); 
       ^
required: String 
found: no arguments 
reason: actual and formal argument lists differ in length 
1 error 

Answer 1

嘗試

public void getInput(){ 
    return input.getText(); 
} 

然後在主

username = "" + gui.getInput();