New to java-need help for debugging

Question

hey there
i just wanted my first program in java and here it is below with the error when i'm compiling it, i cant understand whats wrong:
public class SquareArea {
public static void main(String[] args); {
float length;
float width;
float SquareArea;
System.out.println ("Please enter length"+ length);
System.out.println ("Please enter width"+ width);
SquareArea= length*width;
System.out.println ("The area of the square is" + SquareArea);
The error is:C:\Documents and Settings\User\Desktop\SquareArea.java:5: missing method body, or declare abstract
public static void main(String[] args); {
^
1 error
Tool completed with exit code 1

Answer 1

Reading inputs from the command line is a bit complicated in java, here is how it is done:
first add the line:
import java.io.*;to the beginning of your program.
          float length;
          float width;
          float SquareArea;
          BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
          try
               System.out.println ("Please enter length:");
               String lengthStr = reader.readLine();
               length = Float.parseFloat(lengthStr);
               System.out.println ("Please enter width");
               String widthStr = reader.readLine();
               width = Float.parseFloat(widthStr);
               SquareArea= length*width;
               System.out.println ("The area of the square is" + SquareArea);
          catch (IOException ioe)
               System.out.println("Error reading values.");
               ioe.printStackTrace();
          }