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  1. #1
    tonespy is offline Member
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    Unhappy jAVA Assignment Help

    Java Code:
     import java.awt.*;
    //import javax.swing.JFrame;
    import java.awt.event.*;
    import javax.swing.*;
    
    public class Calculator extends JFrame implements ActionListener{
    
    	JPanel panel1 = new JPanel();
    	JPanel panel2 = new JPanel();
    	JPanel panel3 = new JPanel();
    	JPanel panel4 = new JPanel();
    	JPanel panel5 = new JPanel();
    	
    	// this array initializes the numeric buttons 0-9
    	static final JButton[] numbers ={new JButton("0"),new JButton("1"),new JButton("2"),new JButton("3"),
    		                  new JButton("4"),new JButton("5"),new JButton("6"),new JButton("7"),
    		                  new JButton("8"),new JButton("9")};
    	
    	static final JButton dot=new JButton(".");
    	static final JButton unary_plus_minus=new JButton("+-");
    	static final JButton plus=new JButton("+");
    	static final JButton minus=new JButton("-");
    	static final JButton star=new JButton("*");
    	static final JButton divide=new JButton("/");
    	static final JButton square_root=new JButton("sqr"); // square root of a number
    	static final JButton modulo=new JButton("%");  // remainder of a no divided by another  
    	static final JButton inverse=new JButton("1/x"); // reciprocal of a number
    	static final JButton equals=new JButton("=");
    	
    	// decimal, binary, octal, clear and exit buttons
    	static final JButton dec=new JButton("Dec");
    	static final JButton bin=new JButton("Bin");//disable performing operations in dec and oct mode, switch to octal mode
    												// perform add and subtraction in binary
    	
    	static final JButton oct=new JButton("Oct"); //disable performing operations in dec and bin mode, switch to octal mode
    												 // perform add and subtraction in octal only	
    	static final JButton clear=new JButton("C"); // clear the calculator screen
    	static final JButton close=new JButton("Exit"); // close the application
    	
    	
    	static final JButton mem_read=new JButton("MR"); // recall what is stored in memory
    	static final JButton mem_clear=new JButton("MC"); // cancel value in memory
    	static final JButton mem_store=new JButton("MS"); // store value in memory
    	static final JButton mem_add=new JButton("M+"); // add to what is stored in memory
    		
    	static JTextField display= new JTextField(20);// calculator screen
    	
    	public Calculator() {
    		panel1.setLayout(new FlowLayout(FlowLayout.LEFT,6,4)); // panel to store the numeric and 
    		int i;                                                       // arithmetic operators 
    		for (i=1;i<4;i++) panel1.add(numbers[i]); //add 1-3 number buttons to panel1
    		panel1.add(plus);
    		
    		for (i=4;i<7;i++) panel1.add(numbers[i]); //add 4-6 number buttons to panel1
    		panel1.add(minus);
    				
    		for (i=7;i<10;i++) panel1.add(numbers[i]); //add 7-9 number buttons to panel1
    		panel1.add(star);
    		
    		panel1.add(numbers[0]); //add 0 button to panel1
    		panel1.add(unary_plus_minus);
    		panel1.add(dot);
    		panel1.add(divide);
    		
          		
    		// south
    		panel2.setLayout(new FlowLayout(FlowLayout.LEFT));
    
    		panel2.add(dec);
    		panel2.add(bin);
    		panel2.add(oct);
    		panel2.add(clear);
    		panel2.add(close);
    		
    		//west
    		panel3.setLayout(new GridLayout(4,1));
    		panel3.add(mem_clear);
    		panel3.add(mem_read);
    		panel3.add(mem_store);
    		panel3.add(mem_add);
    		
    		//east
    		panel4.setLayout(new GridLayout(4,1));
    		panel4.add(square_root);
    		panel4.add(modulo);
    		panel4.add(inverse);
    		panel4.add(equals);
    		
    		
    		panel5.setLayout(new BorderLayout());
    		panel5.add(display,BorderLayout.NORTH);
    		panel5.add(panel3,BorderLayout.WEST);
    		panel5.add(panel4,BorderLayout.EAST);
    		panel5.add(panel1,BorderLayout.CENTER);
    		panel5.add(panel2,BorderLayout.SOUTH);
    		
    		
    		getContentPane().add(panel5);
    		
    		// register the buttons
    		for (i=0;i<10;i++) numbers[i].addActionListener(this); // this registers listener for buttons 0-9
    		close.addActionListener(this);
    		clear.addActionListener(this);
                    dec.addActionListener(this);
                    bin.addActionListener(this);
    		oct.addActionListener(this);
                    //
                    mem_clear.addActionListener(this);
                    mem_read.addActionListener(this);
                    mem_store.addActionListener(this);
                    mem_add.addActionListener(this);
                    //
                    square_root.addActionListener(this);
                    modulo.addActionListener(this);
                    equals.addActionListener(this);
                    inverse.addActionListener(this);
                    //
                    unary_plus_minus.addActionListener(this);
                    plus.addActionListener(this);
                    minus.addActionListener(this);
                    star.addActionListener(this);
    		divide.addActionListener(this);
                    square_root.addActionListener(this);
    		// ...
    		// complete the rest
    	}
    	
    
    	
    	
    	
    	public void actionPerformed(ActionEvent e){
    	// write the event handlers for the remaining controls here
    		if(e.getSource()==close) System.exit(0);
    		else if(e.getSource()==clear) display.setText(" ");
    		//else if(e.getActionCommand()=="0") display.setText("0");
    		
    		else if(e.getSource()==inverse){ // this button computes inverse
    			float x= Float.parseFloat(display.getText().trim()); //convert string to float
    			if (x!=0) x=1/x;
    			display.setText(Float.toString(x));
    		}
    		else  display.setText(display.getText()+e.getActionCommand());  // event handler for buttons 0-9
    		
    	// .. complete the rest
    		
        }
    	
    	
    	
    	
    		public static void main(String[] args) {
    		Calculator c1 = new Calculator();
    		c1.setSize(320, 215);
    		c1.setTitle("Calculator");
    		c1.setVisible(true);
    		c1.setDefaultCloseOperation(EXIT_ON_CLOSE);
    		
    	}
    
    
    }
    Last edited by tonespy; 12-16-2012 at 10:25 PM.

  2. #2
    DarrylBurke's Avatar
    DarrylBurke is offline Forum Police
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    Default Re: jAVA Assignment Help

    Please go through the Forum Rules, particularly the third paragraph. Also go through http://www.java-forums.org/forum-gui...w-members.html and BB Code List - Java Programming Forum - Learn Java Programming and edit your post accordingly.

    Did you have a question?

    db
    If you're forever cleaning cobwebs, it's time to get rid of the spiders.

  3. #3
    tonespy is offline Member
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    Default Re: jAVA Assignment Help

    Quote Originally Posted by DarrylBurke View Post
    Please go through the Forum Rules, particularly the third paragraph. Also go through http://www.java-forums.org/forum-gui...w-members.html and BB Code List - Java Programming Forum - Learn Java Programming and edit your post accordingly.

    Did you have a question?

    db
    Yes, making the buttons perform there functions

  4. #4
    Sierra is offline AN21XX
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    Default Re: jAVA Assignment Help

    Well that is easy, just implement the functions within the action listener.
    I like likes!

  5. #5
    tonespy is offline Member
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    Default Re: jAVA Assignment Help

    Quote Originally Posted by tonespy View Post
    Yes, making the buttons perform there functions
    I'm having problem implementing the memory section

  6. #6
    tonespy is offline Member
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    Default Re: jAVA Assignment Help

    okaay
    Last edited by tonespy; 12-17-2012 at 07:35 AM.

  7. #7
    Sierra is offline AN21XX
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    Default Re: jAVA Assignment Help

    Um... what memory function? ^^
    I like likes!

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