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Linear Searches

1 reply on 1 page. Most recent reply: Feb 18, 2004 2:30 AM by mausam

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Lynn Robertson

Posts: 4
Nickname: looloo
Registered: Dec, 2003

Linear Searches

Posted: Feb 17, 2004 8:59 PM

I'm ready to pull out my hair. I'm pretty new to this so it's probably something really simple. Can anyone tell me why I can't enter any key larger than 10? I get the out of bounds message. What's suppose to happen is I enter an index and the search displays the integer at that index. Here's the part of the code where I know the problem exists.

Thanks,
Lynn

//Main Method
public static void main(String[] args)
{
ArrayDemo frame = new ArrayDemo();
frame.pack();
frame.setVisible(true);
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.setSize(230, 120);
}

public int linearSearch(int key, int[] list)
{
key = Integer.parseInt(jtfIndex.getText());
list = new int[100];
for(int counter = 0;counter < list.length;counter++)
list[counter] = (int)(Math.random() * 10);

for(int counter = 0; counter < list.length; counter++)

if (key == list[counter])
return counter;
return -1;
}

//The nitty gritty
public void actionPerformed(ActionEvent e)
{
int key = Integer.parseInt(jtfIndex.getText());
int result = linearSearch(key,list);

if (e.getSource() == jbtShow)
if(result != -1)
jtfElement.setText(String.valueOf(result));
else
jtfElement.setText("Out of Bounds");

}

mausam

Posts: 243
Nickname: mausam
Registered: Sep, 2003

Re: Linear Searches

Posted: Feb 18, 2004 2:30 AM

first thing first...
in the code

public int linearSearch(int key, int[] list)
{
key = Integer.parseInt(jtfIndex.getText());
list = new int[100];
for(int counter = 0;counter < list.length;counter++)
list[counter] = (int)(Math.random() * 10);
 
for(int counter = 0; counter < list.length; counter++)
 
if (key == list[counter])
return counter;
return -1;
}

why are u passing key and list as parameters when u are again initializing it in the function?? Does passing those values serve any purpose ?? No...

Now about the error..
I tried the method with any values as key in the method as i dnt have the frame/textfield and all comp and it worked fine.

May be u are getting error at some otherplace...

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