import java.awt.Color;
import java.awt.Font;
import java.awt.Point;
import java.awt.Dimension;
import javax.swing.BorderFactory;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JFrame;
import javax.swing.ImageIcon;
public class JTextAreaDemo
{
 public static void main(String[] args)
 {
  try{javax.swing.UIManager.setLookAndFeel(javax.swing.UIManager.getSystemLookAndFeelClassName());}catch(Exception e){}
  JTextArea ta = new JTextArea(20,20);
  ta.setBorder (BorderFactory.createEmptyBorder (1,1,1,5));
  ta.setColumns (0); ta.setRows (0);//相当于设置文本区组件的初始大小,并不是说一行只能写0个字符;
  ta.setLineWrap (false);//设置为禁止自动换行,初始值为false.
  ta.setTabSize (4);//设置制表符的大小为8个字符,初始值为4个字符
  ta.setWrapStyleWord (true);
  ta.setBackground (Color.white);//文本区背景
  ta.setForeground (Color.red);//字体颜色
  ta.setFont (new Font ("SansSerif", Font.PLAIN, 14));
  
  
  JScrollPane panel = new JScrollPane(ta);
  panel.setPreferredSize (new Dimension (600,400));
  panel.setBorder(BorderFactory.createMatteBorder (5,5,5,10, Color.white));
  JFrame frame = new JFrame("JTextAreaDemo");//
  frame.setLocation (new Point (212,184));//Point点是frame左上角点的位置
  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
  frame.getContentPane().add(panel);
  frame.pack();
  frame.show();
 }
}

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