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Thread: Need help finishing my program

  1. #1
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    Default 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);
     
    	}
    }


  2. #2
    Super Moderator pbrockway2's Avatar
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    Default Re: Need help finishing my program

    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.

  3. #3
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    Default Re: Need help finishing my program

    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.

  4. #4
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    Default Re: Need help finishing my program

    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);
     
    	} 
    }

  5. #5
    Super Moderator Norm's Avatar
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    Default Re: Need help finishing my program

    how to change uppercase to lower case.
    The String class has a method that will do that.

    However your code does not solve your problem. You need to make a plan as recommended in post#2 before you write the code. Writing code BEFORE you know what the code is supposed to do can be a waste of time.
    Last edited by Norm; April 6th, 2012 at 06:13 AM.
    If you don't understand my answer, don't ignore it, ask a question.

  6. #6
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    Default Re: Need help finishing my program

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

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