Question

I am fairly new to Java and every time I try to compare input to temp, I get all of the results in my array, even if input and temp are not the same.

Code:

if (jRadioButton1.isSelected()) 
{ 
    String temp; 
    try
    {
        for (int i = 0; i < 500; i++)
        { 
            temp = Integer.toString(Read.tempHigh[i]);

            if ( input.equals(temp) );
            {   
                j.TextArea3.append(temp);
                j.TextArea3.append(input);
            }
        }
    }
    catch (NumberFormatException e)
    {   
        jTextArea3.append("Please enter a number");
    }
}

Answer 1

Your line…

if ( input.equals(temp) );

Should not have the ; at the end of it. The ; symbol is closing the if-statement off, so it will always run the j.TextArea3.append() lines no matter what the values of input and temp are.

Your code above should therefore look like this…

if (jRadioButton1.isSelected()){ 
    String temp; 
    try {
        for (int i = 0; i < 500; i++){ 
            temp = Integer.toString(Read.tempHigh[i]);

            if ( input.equals(temp) ) {   
                j.TextArea3.append(temp);
                j.TextArea3.append(input)
            }
        }
    }
    catch (NumberFormatException e){   
        jTextArea3.append("Please enter a number");
    }
}