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DB에서 가져온 일부 데이터로 JList를 채우려고합니다. 처음에는 데이터를 벡터에 넣은 다음 해당 벡터로 JList 생성자를 호출합니다. 매개 변수 인터페이스에 목록을 표시하면 비어있는 것처럼 보이는데, 나에게 무의미합니다. 벡터에 콘솔에 인쇄하여 올바른 데이터가 있는지 확인합니다.JList가 아무것도 표시되지 않는 벡터로 채워짐
다음은 특정 코드 스 니펫이며 나중에 완전한 클래스입니다.
특정 snipet : 여기
query = "SELECT * FROM SENSORES WHERE IDDRONE = " + idDrone;
rs = sentencia.executeQuery(query);
String temp;
Vector<String> vector = new Vector<String>();
while(rs.next())
{
temp = rs.getString("ID") + " " + rs.getString("DESCRIPCION");
vector.add(temp);
}
jList1 = new JList<String>(vector);
System.out.println(vector);
그리고 전체 클래스, JList의 선언은 끝에 :
package UI;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;
import javax.swing.JList;
import sqlConnection.DatabaseConnection;
public class DeustoDronesJFrame extends javax.swing.JFrame {
/**
* Creates new form DeustoDronesJFrame
* @throws SQLException
*/
public DeustoDronesJFrame() throws SQLException {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
* @throws SQLException
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() throws SQLException {
jLabel2 = new javax.swing.JLabel();
jScrollPane1 = new javax.swing.JScrollPane();
jLabel1 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel2.setFont(new java.awt.Font("Times New Roman", 2, 18)); // NOI18N
jLabel2.setForeground(new java.awt.Color(0, 0, 153));
jScrollPane1.setViewportView(jList1);
Statement sentencia = DatabaseConnection.getInstance().createStatement();
String query = "SELECT * FROM DRONES";
ResultSet rs = sentencia.executeQuery(query);
String idDrone = rs.getString("IDDRONE");
String estadoGPS = rs.getString("ESTADOGPS");
System.out.println(estadoGPS);
if (estadoGPS.equals(estadoGPS))
estadoGPS = "OFF";
else
estadoGPS = "ON";
query = "SELECT * FROM SENSORES WHERE IDDRONE = " + idDrone;
rs = sentencia.executeQuery(query);
String temp;
Vector<String> vector = new Vector<String>();
while(rs.next())
{
temp = rs.getString("ID") + " " + rs.getString("DESCRIPCION");
vector.add(temp);
}
jList1 = new JList<String>(vector);
System.out.println(vector);
jLabel1.setText("jLabel1");
jLabel2.setText("Drone" + idDrone);
jLabel3.setText("GPS " + estadoGPS);
jButton1.setText("CAMBIAR ESTADO GPS");
jButton2.setText("CAMBIAR ESTADO SENSOR");
jButton3.setText("HISTORICO SENSOR");
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(24, 24, 24)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jLabel2)
.add(layout.createSequentialGroup()
.add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 328, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(42, 42, 42)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
.add(jButton2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(jButton3, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.add(layout.createSequentialGroup()
.add(12, 12, 12)
.add(jLabel1)
.add(84, 84, 84)
.add(jLabel3)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
.add(jButton1)))
.addContainerGap(88, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(26, 26, 26)
.add(jLabel2)
.add(24, 24, 24)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jLabel1)
.add(jLabel3)))
.add(layout.createSequentialGroup()
.add(63, 63, 63)
.add(jButton1)))
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 62, Short.MAX_VALUE)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 224, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(69, 69, 69))
.add(layout.createSequentialGroup()
.add(59, 59, 59)
.add(jButton2)
.add(52, 52, 52)
.add(jButton3)
.addContainerGap())))
);
pack();
}// </editor-fold>//GEN-END:initComponents
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/*
* Set the Nimbus look and feel
*/
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/*
* If Nimbus (introduced in Java SE 6) is not available, stay with the
* default look and feel. For details see
* http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(DeustoDronesJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(DeustoDronesJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(DeustoDronesJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(DeustoDronesJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/*
* Create and display the form
*/
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
try {
new DeustoDronesJFrame().setVisible(true);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JList jList1;
private javax.swing.JScrollPane jScrollPane1;
// End of variables declaration//GEN-END:variables
}
감사합니다 여러분.
. 정말 고마워... –