Help: function call problems - determine whether two integers are equal , call the function does not print

class FunctionDemo
{
public static void main (String [] args)
{
equals (7,5);
}
public static boolean equals (int a, int b)
{
if (a == b)
return true;
else
return false;
}
}
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  public class FunctionDemo {
  	public static void main(String[] args) {
  		System.out.println(equals(7, 5));
  	}
  
  	public static boolean equals(int a, int b) {
  		if (a == b)
  			return true;
  		else
  			return false;
  	}
  }
  

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sorry first post, how out format is so ah , declare that I am writing format compliant , the compiler also through , just do not print true, or false. May I ask where is the problem !
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ask why the output statement must use it, can not directly call the function equals do ? Because I 'm learning video , there is a definition of a void function , the console print out a rectangle , the function of which used for nesting , and then calls the main function directly , you can of
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what you write on your computer do what .
You did not write output statements to your own computer does not output
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Thank you ! Keep up the good