java中方法重载什么？

public class CaiNiao{
    
    public static void main(String[] args){
        byte a = 10;
        byte b = 20;
        System.out.println(isSame(a,b));
        
        System.out.println((isSame(short)20,(short)20));
        
        System.out.println(isSame(11,22));
        
        System.out.println(isSame(10L,10L));
    }
    
    public static boolean isSame(byte a,byte b){
        System.out.println("两byte参数的方法执行！");
        boolean same ;
        if(a==b){
            same = true;
        }else{
            same = false;
        }
        return same;
    }

    public static boolean isSame(short a,short b){
        System.out.println("两short参数的方法执行！");
        boolean same = a == b ?true:false;
        return same;
    }
    
    public static boolean isSame(int a,int b){
        System.out.println("两int参数的方法执行！");
        return a == b:;
    }
    
    public static boolean isSame(long a,long b){
        System.out.println("两long参数的方法执行！");
        if (a==b){
            return true;
        }
        else{
            return false;
        }
    }
}