JTextArea追加新行不起作用

Question

向jtextarea添加「/ n」應該創建一個新行。但在我的情況下，它只是打印出來。我怎樣才能解決這個問題？

這裏是我的代碼：

package main; 

import java.awt.GridLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 

import javax.swing.*; 

public class ConsoleWindow { 
static JTextArea out = new JTextArea(5, 50); 
final static String newline = "/n"; 
public static void openWindow(){ 
    JFrame f = new JFrame("Developer console"); 
    JTextField in = new JTextField(50); 
    JButton b = new JButton("GO"); 
    JPanel p1 = new JPanel(new GridLayout(1,1,10,10)); 
    JPanel p2 = new JPanel(new GridLayout(2,1,10,10)); 

    p1.add(out); 
    p2.add(in); 
    p2.add(b); 

    b.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent arg0) { 
      printText(); 
     } 
    }); 

    f.setLayout(new GridLayout(2,1,10,10)); 
    f.add(p1); 
    f.add(p2); 
    f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 
    f.setResizable(false); 
    f.pack(); 
    f.setVisible(true); 
} 
public static void printText(){ 
    out.append("Hello "+newline); 
    out.append("Hello123 "+newline); 
} 
} 

Answer 1

通過

final static String newline = "\n";