Pythagorean Triples Using A For Loop

I have generated many errors in my code for this program but I particularly want to focused on the first error that comes up. Here is the outline of my code:

//a java application that prints the table of pythagorean triples that go up to 500 using a for loop
public class luby{
 //main method executes java application
 public static void main(String args[]){
 //declare variables
 
for(int side_1=1; int side_1 <=500; side_1++){
for(int side_2=1; int side_2 <=500; side_2++){
 
[Code] ....

Here is the output of my code when I attempt to compile it:

C:UsersCourtneyDesktopchapter five exercises for javaluby.java:12: error: '.class' expected
for(int side_1=1; int side_1 <=500; side_1++){
^
C:UsersCourtneyDesktopchapter five exercises for javaluby.java:12: error: illegal start of expression
for(int side_1=1; int side_1 <=500; side_1++){

[Code] ....

12 errors

Tool completed with exit code 1

The first error I want to focus on is the class error; I will focus on the remaining errors once this error is resolved