建立一個JTextField文字欄位

package test.swing.component;

import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;

public class TestJTextField extends JFrame {
 
 private JPanel contentPane;

 public static void main(String[] args) {
  TestJTextField frame = new TestJTextField();
  frame.setVisible(true);
 }
 
 public TestJTextField(){
  setBounds(100, 100, 450, 300);   //(左邊界,上邊界,宽度,長度)
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
  contentPane = new JPanel();
  contentPane.setBorder(new EmptyBorder(10,10,10,10));   //(上,左,下,右)
  setContentPane(contentPane);
  
  //將Layout設定為由左至右的排列components之間的關係,超出面板宽度的元件往下列遞補
  contentPane.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));   //(置左,左右間距,上下間距)
  
  JTextField nameTF = new JTextField("請輸入資料...");
  nameTF.setColumns(15);
  
  contentPane.add(nameTF);
  
 }

}