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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