JTable 열이 나타나지 않습니다.

Question

프레임에 간단한 jtable을 표시하려고하지만 표의 열을 표시하지 않습니다. Oracle 튜토리얼의 예제를 따라 갔지만 올바르게하지 않았습니다. 프로그램이 컴파일되고 실행 중입니다. 여기 코드는 다음 JTable가 JScrollPane 내에 있을지

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 

import java.awt.BorderLayout; 
import java.awt.Dimension; 
import java.awt.GridLayout; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import java.math.BigDecimal; 
import java.math.RoundingMode; 

public class SimpleTableDemo extends JPanel 
{ 

    SimpleTableDemo() 
    { 
     String[] columnNames = {"#", 
       "Repayment Dates", 
       "Principle Amount", 
       "Interest", 
       "Comission fee", 
       "Total installement amount", 
       "Principle balance"}; 

//  BigDecimal bd = new BigDecimal(d).setScale(2, RoundingMode.HALF_EVEN); 
     //each line of the two dimentional array is a line in the table 
     Object[][] data = { 
       {new Integer(1), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(2), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(3), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(4), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(5), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(6), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(7), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(8), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(9), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(10), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(11), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(12), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(13), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(14), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(15), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(16), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(17), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
       {new Integer(18), new java.util.Date(), new BigDecimal(12509.23).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(1571.77).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(0.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(14081.00).setScale(2, RoundingMode.HALF_EVEN), new BigDecimal(147490.77).setScale(2, RoundingMode.HALF_EVEN)}, 
      }; 


     JTable table = new JTable(data, columnNames); 

//  JScrollPane scrollPane = new JScrollPane(table); 
//  scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
//  scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);  
     table.setFillsViewportHeight(true); 
     this.add(table); 
    } 

    public static void main(String[] args) 
    { 
     JFrame application = new JFrame(); 
     SimpleTableDemo panel = new SimpleTableDemo(); 
     application.add(panel); 
     application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
//  application.setSize(730,650); 
     application.pack(); 
     application.setLocationRelativeTo(panel); 
//  application.setResizable(false); 
     application.setVisible(true); 
    } 
} 

Answer 1

테이블 컬럼은 자동으로 표시됩니다. 단지 주석 JScrollPane scrollPane = new JScrollPane(table); 및 갖는 JScrollPane 항상 도움이 this.add(table);

Answer 2

this.add(scrollpane);에 변경 - 대신 this.add(table);의 , this.add(new JScrollPane(table));

시도 사실, 당신은 이미 거짓말 약간의 스크롤 관련 코드를 갖고있는 것 같다. 당신이해야 할 모든 당신의 JTable이 scrollpane에 추가입니다

JScrollPane scrollPane = new JScrollPane(table); 
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED); 

: 당신은 이미 다음과 같은 코드가 있습니다.

그러나 사용자 인터페이스 업데이트는 이벤트 디스패치 스레드에서 발생하는 것이 좋습니다. 기본적으로, 대신이있는의 :

public static void main(String[] args) 
    { 
     JFrame application = new JFrame(); 
     SimpleTableDemo panel = new SimpleTableDemo(); 
     application.add(panel); 
     application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
//  application.setSize(730,650); 
     application.pack(); 
     application.setLocationRelativeTo(panel); 
//  application.setResizable(false); 
     application.setVisible(true); 
    } 

고려 :

public static void main(String[] args) 
{ 
    java.awt.EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       JFrame application = new JFrame(); 
       SimpleTableDemo panel = new SimpleTableDemo(); 
       application.add(panel); 
       application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
      //  application.setSize(730,650); 
       application.pack(); 
       application.setLocationRelativeTo(panel); 
      //  application.setResizable(false); 
       application.setVisible(true); 
      } 
     }); 
} 

This article 당신이