本文介绍了Jtable变得不可见?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在我的以下代码中，通过单击添加"&搜索按钮.但是在单击获取值"后，它没有显示"Jtable2"，它的名称为"jTable2.setModel(new DefaultTableModel(data3，columns2));".这里是两个Jtables.单击获取值"后分配Jtable2代码是:
In my following code I am successfully able to show data in table by clicking on "Add" & search button. But after clicking "Get values" it is not showing the "Jtable2" which is given as "jTable2.setModel(new DefaultTableModel(data3, columns2));"Here their are two Jtables. Jtable2 is assigned after click on "Get Values"The code is:
package com.ash;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.table.DefaultTableModel;
import javax.swing.JLabel;
import javax.swing.GroupLayout.Alignment;
import javax.swing.GroupLayout;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JPanel;
public class ReportD extends javax.swing.JFrame {
static Object[][] data ;
static Object[][] data2;
static Object[] columns={"FirstName","LastName","Age","RefDoctor","Sex","RegId","test"};
public static int NumOfCol;
public Object[] columns2;
static Object[][] data3;
Connection con;
Connection con2,con3;
ResultSet rs,rs1,rs2,rs3;
Statement stmt=null;
Statement stmt2=null;
Statement stmt3=null;
int k=0;
PreparedStatement pr,pr2,pr3;
String Gid,Gtest;
public ReportD() {
initComponents();
}
private void initComponents() {
jButton1 = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
table = new javax.swing.JTable();
jTextField1 = new javax.swing.JTextField();
jButton2 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Report");
//jtable1
jButton1.setText("Add");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
try {
jButton1ActionPerformed(evt);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
table.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null, null, null,null},
},
new String [] {
"First Name", "Last Name", "Age", "Ref Doctor", "Sex", "Reg Id","test"
}
) {
boolean[] canEdit = new boolean [] {
false, false, false, false, false, false,false
};
public boolean isCellEditable(int rowIndex, int columnIndex) {
return canEdit [columnIndex];
}
});
jScrollPane1.setViewportView(table);
table.getColumnModel().getColumn(0).setResizable(false);
table.getColumnModel().getColumn(1).setResizable(false);
table.getColumnModel().getColumn(2).setResizable(false);
table.getColumnModel().getColumn(3).setResizable(false);
table.getColumnModel().getColumn(4).setResizable(false);
table.getColumnModel().getColumn(5).setResizable(false);
table.getColumnModel().getColumn(6).setResizable(false);
jButton2.setText("Search");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt1) {
try {
jButton2ActionPerformed(evt1);
} catch (ClassNotFoundException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} //catch block created
}
});
jLabel1.setText("Enter Reg. Id");
// The button Get Value and it prints the value of selected row
getValue = new JButton("Get Value");
getValue.setToolTipText("Get values from table");
getValue.addActionListener(new ActionListener() {
@SuppressWarnings("deprecation")
public void actionPerformed(ActionEvent e) {
Gid = (String) table.getValueAt(table.getSelectedRow(), 5);
Gtest=(String) table.getValueAt(table.getSelectedRow(), 6);
System.out.println(Gid);
System.out.println(Gtest);
//selected's code start here yo yoooo
jScrollPane2 = new javax.swing.JScrollPane();
jTable2 = new javax.swing.JTable();
//storing the value of Registration id and test did from the ReportD table
try {
System.out.println("in selected"+Gid+Gtest);
con=DbConnPa.getConObj();
con3=DbConnPa.getConObj();
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("SELECT * FROM "+Gtest+"");
ResultSetMetaData rsmd = rs.getMetaData();
NumOfCol = rsmd.getColumnCount(); //it stores the number of columns in NumOfCol
// System.out.println("No. of columns in "+Gtest+"is"+NumOfCol);
String o1="null";
String t1="\"Title";
String c1="\"";
String c2=c1.concat(rsmd.getColumnName(1)+"\"");
int m=1;
for(m=1;m<NumOfCol;m++){
o1=o1.concat(",null");
t1=(t1+m).concat("\",\"Title");
}System.out.println(o1);
System.out.println(t1+(m)+"\"");
for(int n=2;n<=NumOfCol;n++)
{
//System.out.println("Name of ["+i+"] Column="+rsmd.getColumnName(i));
c2=c2.concat(","+"\""+rsmd.getColumnName(n)+"\"");
}System.out.println(c2);
jTable2.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {{o1},}, new String [] {c2} ));
// Object columns2[]={c2};
String sql3="SELECT COUNT (*) FROM "+Gtest+" where regid LIKE '"+Gid+"%'";
pr3=con3.prepareStatement(sql3);
rs3=pr3.executeQuery(sql3);
rs3.next();
int count = 0;
// int col1=NumOfCol;
count = rs3.getInt(1);
System.out.println(count);
data3= new Object [count][NumOfCol];
stmt3=con3.createStatement();
String sql4="SELECT * FROM "+Gtest+" where regid LIKE '"+Gid+"%'";
rs3=stmt3.executeQuery(sql4);
k=0;
while(rs3.next()){
for(int j=0;j<NumOfCol;j++){
data3[k][j]=rs3.getString(j+1);
System.out.println("k:"+k+"j:"+j);
}
k++;}
Object[] columns2={c2};
jScrollPane2.setSize(745, 134);
jScrollPane2.setLocation(0, 570);
jTable2.setColumnSelectionAllowed(true);
jScrollPane2.setViewportView(jTable2);
jTable2.getColumnModel().getSelectionModel().setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
jTable2.setModel(new DefaultTableModel(data3, columns2));
jTable2.setVisible(true);
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
} catch (SQLException e1) {
e1.printStackTrace();
}
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
layout.setHorizontalGroup(
layout.createParallelGroup(Alignment.TRAILING)
.addGroup(layout.createSequentialGroup()
.addContainerGap(69, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(Alignment.TRAILING)
.addGroup(layout.createSequentialGroup()
.addComponent(getValue)
.addGap(431))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(Alignment.LEADING)
.addComponent(jButton1)
.addGroup(layout.createParallelGroup(Alignment.TRAILING, false)
.addGroup(layout.createSequentialGroup()
.addGap(10)
.addComponent(jLabel1, GroupLayout.PREFERRED_SIZE, 96, GroupLayout.PREFERRED_SIZE)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(jTextField1)
.addPreferredGap(ComponentPlacement.UNRELATED)
.addComponent(jButton2))
.addComponent(jScrollPane1, GroupLayout.PREFERRED_SIZE, 536, GroupLayout.PREFERRED_SIZE)))
.addGap(224))))
);
layout.setVerticalGroup(
layout.createParallelGroup(Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(30)
.addComponent(jButton1)
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(Alignment.LEADING, false)
.addGroup(layout.createParallelGroup(Alignment.BASELINE)
.addComponent(jTextField1, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addComponent(jButton2))
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel1, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(5)))
.addGap(2)
.addComponent(jScrollPane1, GroupLayout.PREFERRED_SIZE, 184, GroupLayout.PREFERRED_SIZE)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(getValue)
.addContainerGap(371, Short.MAX_VALUE))
);
getContentPane().setLayout(layout);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) throws ClassNotFoundException, SQLException {
con=DbConnPa.getConObj();
String sql="SELECT COUNT (*) FROM newpatient1";
pr=con.prepareStatement(sql);
rs=pr.executeQuery(sql);
rs.next();
int count = 0;
count = rs.getInt(1);
System.out.println(count);
data= new Object [count][7];
stmt=con.createStatement();
String sql1="SELECT * FROM newpatient1";
rs1=stmt.executeQuery(sql1);
while(rs1.next()){
for(int j=0;j<7;j++){
data[k][j]=rs1.getString(j+1);
// System.out.println("i="+"j="+j);
}
k++;}
table.setModel(new DefaultTableModel(data, columns));
table.setAutoCreateRowSorter(true);
}
public void jButton2ActionPerformed(java.awt.event.ActionEvent evt1) throws SQLException, ClassNotFoundException {
String search=jTextField1.getText();
con2=DbConnPa.getConObj();
String sql="SELECT COUNT (*) FROM newpatient1 where regid LIKE '"+search+"%'";
pr=con2.prepareStatement(sql);
rs=pr.executeQuery(sql);
rs.next();
int count = 0;
count = rs.getInt(1);
System.out.println(count);
data2= new Object [count][7];
stmt=con2.createStatement();
//String sql2="SELECT * FROM newpatient1 WHERE regid LIKE"+"'"+search+"%'";
String sql2="SELECT * FROM newpatient1 where regid LIKE '"+search+"%'";
System.out.println(search);
stmt2=con2.createStatement();
rs2=stmt2.executeQuery(sql2);
k=0;
while(rs2.next()){
data2[k][0]=rs2.getString(1);
data2[k][1]=rs2.getString(2);
data2[k][2]=rs2.getString(3);
data2[k][3]=rs2.getString(4);
data2[k][4]=rs2.getString(5);
data2[k][5]=rs2.getString(6);
data2[k][6]=rs2.getString(7);
String data=rs2.getString(2);
// System.out.println(data+"k=="+k);
k++;}
table.setModel(new DefaultTableModel(data2, columns));
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
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(ReportD.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(ReportD.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(ReportD.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(ReportD.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() {
new ReportD().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTable table;
private javax.swing.JTable jTable2;
private JButton getValue;
}
推荐答案
您正在将jScrollPane2的viewPort设置为jTable2，但是，您没有将jScrollPane2添加到JFrame本身.我认为，在actionPerformed中，对于getValue JButton，您应该这样写:
You are setting the viewPort of jScrollPane2 as jTable2 but, you are not adding jScrollPane2 to the JFrame itself. In my opinion, within actionPerformed for getValue JButton You should write:
jScrollPane1.setViewportView(jTable2);
代替
jScrollPane2.setViewportView(jTable2);
编辑
如果您不想替换jScrollPane1 viewPort，则只需将jScrollPane2添加到JFrame即可.它会在您的JFrame上显示jTable2.
EDIT
In case you don't want to replace the jScrollPane1 viewPort then just add the jScrollPane2 to JFrame . It would show the jTable2 on your JFrame.
这篇关于Jtable变得不可见?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！