How can the sizes of two variables in Java be compared?

In Java, comparison operators (<, >, <=, >=) can be used to determine the size of two variables. If variable a is less than variable b, the result of the expression a < b is true; if variable a is greater than variable b, the result of the expression a > b is true; if variable a is less than or equal to variable b, the result of the expression a <= b is true; if variable a is greater than or equal to variable b, the result of the expression a >= b is true.