Thread: Need help finishing my program

Hello Community, looking to see if anyone can help me finish my code. I am making a program that turns upper case to lower case and lower case to upper case at the push of the button. I have everything set up 2 text fields, 1 button. i am stuck and have no clue how to make it do what i want. i have tried a few things but nothing seems to work. Can anyone get me going in the right direction. Thanks
Here is my code so far:

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.util.*;
import java.io.*;
 
public class Ulcase
{
 
	JLabel l1,l2;
	JTextField tf1,tf2;
	JButton b1;
 
public static void main(String[] args) 
	{
 
	new Ulcase();
 
	}
 
public Ulcase()
	{
		JFrame frame1 = new JFrame();
		frame1.setTitle("Converting Cases"); 			
		frame1.setSize(700,75);              		
 
		JLabel l1 = new JLabel("Word to Convert");	
		JLabel l2 = new JLabel("Converted Word");	
 
		JTextField tf1 = new JTextField(10);
		JTextField tf2 = new JTextField(5);
 
		JButton b1 = new JButton("Press To Convert");
 
		b1.addActionListener(new ActionListener() {
 
 			public void actionPerformed(ActionEvent e)
            {
 
 
            }
		});
 
 
		tf2.setEditable(false);
 
		Container pane = frame1.getContentPane();
		pane.setLayout(new GridLayout(1,3) );
 
		pane.add(l1);
		pane.add(tf1);
		pane.add(l2);
		pane.add(tf2);
		pane.add(b1);
 
 
		frame1.setLocationRelativeTo(null);
		frame1.setDefaultCloseOperation(frame1.EXIT_ON_CLOSE);
		frame1.setVisible(true);
 
	}
}

i am stuck and have no clue how to make it do what i want. i have tried a few things but nothing seems to work.

Forget the code for a moment, because you need a plan (quite comprehensive and precise) before you can write any code.

Suppose you were given the task of swapping the case of the characters in a string you were presented with. What would you - rather than a computer - do? What are the steps you would follow, steps that would work for any string whatsoever: "cAsE", "c453", "", etc.

Once you have a clear sequence of steps have a look in the API documentation - especially that of the String and Character class - for ways of expressing that plan in code.

Well i have steps that i am trying to follow but i am still at the beginner stage so even though i kind of know the steps, im still lost. i been at it for a few hours. Which is why i signed up to the forums and posted for help. I know i am missing something but it was hard enough for me to get to this point. I know you are trying to help me Thank you.

Ok i got it to change the whole input into uppercase, so im almost done. im just stuck again at how to change uppercase to lower case.

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.util.*;
import java.io.*;
 
public class Window extends JFrame implements ActionListener
{
  private JTextField t1,t2;
  private JLabel myLab;
  private JButton b1, b2;
  private Container c;
 
public Window()
	{				
 		c=getContentPane();
  		c.setLayout(new FlowLayout());
  		c.setBackground(Color.WHITE);
 
  		myLab= new JLabel();
  		myLab.setText("Word to Convert:  ");
  		c.add(myLab);
 
  		t1=new JTextField(15);
  		t1.setBackground(Color.WHITE);
  		c.add(t1);
 
  		t2=new JTextField(20);
  		t2.setEditable(false);
  		c.add(t2);
 
  		b1=new JButton("Convert");
  		b1.addActionListener(this);
  		c.add(b1);
 
  	}
 
public void actionPerformed(ActionEvent e)
	{
  		String name = t1.getText();
	 	t2.setText(name);
     	        t1.setText("");
		name = name.toUpperCase();
		t2.setText(name);
 
	}
 
public static void main(String[] args)
	{
   	Window h1= new Window();
		h1.setTitle("Converting Cases");
		h1.setLocationRelativeTo(null);
	 	h1.setSize(400,100);
	 	h1.setVisible(true);
	 	h1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
	} 
}

I would recommend two buttons. One calls String.toUpperCase() and the other calls String.toLowerCase() on the text field's String value when pressed.