The Ordinal Comparisons Operators: <, <=, >, and >= : Comparison Operators « Operators « SCJP

//These are applicable to all numeric types and to char and produce a boolean result.
public class MainClass {
  public static void main(String[] argv) {

    int a = 9;
    int b = 65;
    int c = -12;
    float d = 9.0F;
    char e = 'A';

    System.out.println(a < b);
    System.out.println(d < c);
    System.out.println(e <= a);
    System.out.println(a > d);
    System.out.println(c >= e);

2.6.Comparison Operators
2.6.1.Comparison Operator Summary
2.6.2.Comparison operators <, <=, >, >=, = =, and != return a boolean result.
2.6.3.Comparison operators are commonly used to form conditions
2.6.4.The Ordinal Comparisons Operators: <, <=, >, and >=
2.6.5.It is acceptable to compare the float value to the char variable c.
2.6.6.Ordinal comparisons are not applicable to any non-numeric types.
2.6.7.The Equality Comparison Operators: == and != for primitive types
2.6.8.The Equality Comparison Operators: == and != for variables of object type
2.6.9.You should not use these operators to compare the contents of objects.
2.6.10.To do a content comparison, use equals() method rather than the == or != operator.
2.6.11.For object references, the == operator returns true only if both references are to the same object.
2.6.12.Define your own equals Method
2.6.13.The == with Strings Trap
2.6.14."Equality" Operators
2.6.15.Equality for Reference Variables
2.6.16.Equality for Enums