/*trying to set the textfield to null when i input the numbers but the
zero still remains after i start typing.How to i get it to disapear when
i start typing */
package Vectors;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.*;
import java.util.*;
import javax.swing.*;
public class vectorRef extends JFrame implements ActionListener{
JLabel label;
JTextField textfield;
JButton button,cancel;
JFrame frame;
String input = null;
/*declaire a contructor for the class*/
public vectorRef(){
frame = new JFrame();
frame.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(10,10,5,10);
label = new JLabel("Enter ID");
gbc.gridx = 0;
gbc.gridy = 1;
frame.add(label,gbc);
/*add a textfield to frame*/
textfield = new JTextField(15);
gbc.gridx = 1;
gbc.gridy = 1;
frame.add(textfield,gbc);
textfield.setText("0");
textfield.addActionListener(this);
/*add a button cancel to the frame*/
cancel = new JButton("Cancel");
gbc.gridx = 0;
gbc.gridy = 2;
frame.add(cancel,gbc);
cancel.addActionListener(this);
/*add a button to the frame*/
button = new JButton("Submit");
gbc.gridx = 1;
gbc.gridy = 2;
frame.add(button,gbc);
button.addActionListener(this);
frame.setSize(300,300);
frame.setVisible(true);
}
@Override
public void actionPerformed(ActionEvent arg0) {
if(arg0.getSource() == button){
Submit();
textfield.setText("0");
}
if(arg0.getSource() == cancel){
textfield.setText("0");
}
// TODO Auto-generated method stub
}
Vector<Integer>v = new Vector<Integer>();
public void Submit(){
input = textfield.getText();
int inputS = Integer.parseInt(input);
v.add(inputS);
Iterator itr = v.iterator();
//use hasNext() and next() methods of Iterator to iterate through the elements
System.out.println("Iterating through Vector elements...");
while(itr.hasNext())
System.out.println(itr.next());
//System.out.println(inputS);
}
public static void main(String[] args){
new vectorRef();
}
}
nutihu 0 Newbie Poster
nutihu 0 Newbie Poster
/*trying to set the textfield to null before i input the numbers but the
zero still remains after i start typing.How to i get it to disapear when
i start typing */
package Vectors;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.*;
import java.util.*;
import javax.swing.*;
public class vectorRef extends JFrame implements ActionListener{
JLabel label;
JTextField textfield;
JButton button,cancel;
JFrame frame;
String input = null;
/*declaire a contructor for the class*/
public vectorRef(){
frame = new JFrame();
frame.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(10,10,5,10);
label = new JLabel("Enter ID");
gbc.gridx = 0;
gbc.gridy = 1;
frame.add(label,gbc);
/*add a textfield to frame*/
textfield = new JTextField(15);
gbc.gridx = 1;
gbc.gridy = 1;
frame.add(textfield,gbc);
textfield.setText("0");
textfield.addActionListener(this);
/*add a button cancel to the frame*/
cancel = new JButton("Cancel");
gbc.gridx = 0;
gbc.gridy = 2;
frame.add(cancel,gbc);
cancel.addActionListener(this);
/*add a button to the frame*/
button = new JButton("Submit");
gbc.gridx = 1;
gbc.gridy = 2;
frame.add(button,gbc);
button.addActionListener(this);
frame.setSize(300,300);
frame.setVisible(true);
}
@Override
public void actionPerformed(ActionEvent arg0) {
if(arg0.getSource() == button){
Submit();
textfield.setText("0");
}
if(arg0.getSource() == cancel){
textfield.setText("0");
}
// TODO Auto-generated method stub
}
Vector<Integer>v = new Vector<Integer>();
public void Submit(){
input = textfield.getText();
int inputS = Integer.parseInt(input);
v.add(inputS);
Iterator itr = v.iterator();
//use hasNext() and next() methods of Iterator to iterate through the elements
System.out.println("Iterating through Vector elements...");
while(itr.hasNext())
System.out.println(itr.next());
//System.out.println(inputS);
}
public static void main(String[] args){
new vectorRef();
}
}
ajst 18 Junior Poster
use the event when the text field gains focus so when you select it, the text is set to null.
private void jTextField1FocusGained(java.awt.event.FocusEvent evt) {
// TODO add your handling code here:
jTextField1.setText("");
//or jTextField1.setText(null);
} Be a part of the DaniWeb community
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