Java 只有第一个ArrayList起作用
所以我创建了两个相同的方法，它们返回椅子ID和预订日期：Java 只有第一个ArrayList起作用,java,mysql,arraylist,Java,Mysql,Arraylist,所以我创建了两个相同的方法，它们返回椅子ID和预订日期： public ArrayList<String> GetChair(String Class) throws SQLException{ ArrayList<String> arr = new ArrayList<String>(20); openconnection(); String querychair = "SELECT * FROM hema.flight_
public ArrayList<String> GetChair(String Class) throws SQLException{
ArrayList<String> arr = new ArrayList<String>(20);
openconnection();
String querychair = "SELECT * FROM hema.flight_usa WHERE free = 1 and class='"+Class+"'";
Statement stm=(Statement) con.createStatement();
ResultSet rs;
rs = stm.executeQuery(querychair);
while(rs.next())
{
arr.add(rs.getString("chair_id"));
}
return arr;
}
//---------------- The Second One ----------------------------------------
public ArrayList<String> GetDate(String Class) throws SQLException{
ArrayList<String> arr2 = new ArrayList<String>(20);
openconnection();
String querydate = "SELECT * FROM hema.flight_usa WHERE free = 1 and class='"+Class+"'";
Statement stm=(Statement) con.createStatement();
ResultSet rst;
rst = stm.executeQuery(querydate);
while(rst.next())
{
arr2.add(rst.getString("res_date"));
}
return arr2;
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
try {
String Class=Class1Text.getText();
Model model =new Model();
ArrayList<String> arr1=new ArrayList<String>(20);
arr1=model.GetDate(Class);
jTextField12.setText(arr1.get(0));
jTextField13.setText(arr1.get(1));
jTextField14.setText(arr1.get(2));
jTextField15.setText(arr1.get(3));
jTextField16.setText(arr1.get(4));
jTextField17.setText(arr1.get(5));
jTextField18.setText(arr1.get(6));
jTextField19.setText(arr1.get(7));
jTextField20.setText(arr1.get(8));
jTextField21.setText(arr1.get(9));
ArrayList<String> arr=new ArrayList<String>(20);
arr = model.GetChair(Class);
jTextField2.setText(arr.get(0));
jTextField3.setText(arr.get(1));
jTextField4.setText(arr.get(2));
jTextField5.setText(arr.get(3));
jTextField6.setText(arr.get(4));
jTextField7.setText(arr.get(5));
jTextField8.setText(arr.get(6));
jTextField9.setText(arr.get(7));
jTextField10.setText(arr.get(8));
jTextField11.setText(arr.get(9));
} catch (SQLException ex) {
Logger.getLogger(Reservation.class.getName()).log(Level.SEVERE, null, ex);
}
}
在java.awt.EventDispatchThread.runEventDispatchThread.java:82时抛出IndexOutOfBoundsException以指示索引超出范围。在第二个结果集中，您调用了10个结果，结果中可能只有3行。在获取详细信息之前检查列表的大小
if(arr1.size()>9){
jTextField12.setText(arr1.get(0));
jTextField13.setText(arr1.get(1));
jTextField14.setText(arr1.get(2));
jTextField15.setText(arr1.get(3));
jTextField16.setText(arr1.get(4));
jTextField17.setText(arr1.get(5));
jTextField18.setText(arr1.get(6));
jTextField19.setText(arr1.get(7));
jTextField20.setText(arr1.get(8));
jTextField21.setText(arr1.get(9));
}
表中所选类可能只有3行。那么？那么问题是什么？问题是异常消息所说的。问题也出在异常堆栈跟踪显示的位置，但您选择对我们隐藏此信息。当然不是。。。我只是不知道它会有帮助：/I我已经编辑了它。问题在Reservation.java的第293行，在jButton1ActionPerformed方法中。你看，你需要的所有信息都在堆栈跟踪中。