How do I find the max and min values of primitive types?
Author: Deron Eriksson
Description: This Java tutorial shows how to display the maximum and minimum values for primitive types.
Tutorial created using:
Windows XP || JDK 1.6.0_10 || Eclipse JEE Ganymede SR1 (Eclipse 3.4.1)
JavaSW features wrapper classes for the Java primitive types. The sizes (in bits), the minimum values, and the maximum values can be determined via the SIZE, MIN_VALUE, MAX_VALUE fields on the Byte, Short, Character, Integer, Long, Float, and Double wrapper classes. The PrimitiveTypeSizeMinMax class displays these values to standard output. PrimitiveTypeSizeMinMax.javapackage com.cakes; public class PrimitiveTypeSizeMinMax { public static void main(String[] args) { // Boolean does not have Boolean.SIZE, Boolean.MIN_VALUE, or Boolean.MAX_VALUE displaySizeMinAndMax(Byte.TYPE, Byte.SIZE, Byte.MIN_VALUE, Byte.MAX_VALUE); displaySizeMinAndMax(Short.TYPE, Short.SIZE, Short.MIN_VALUE, Short.MAX_VALUE); displaySizeMinAndMax(Character.TYPE, Character.SIZE, (int) Character.MIN_VALUE, (int) Character.MAX_VALUE); displaySizeMinAndMax(Integer.TYPE, Integer.SIZE, Integer.MIN_VALUE, Integer.MAX_VALUE); displaySizeMinAndMax(Long.TYPE, Long.SIZE, Long.MIN_VALUE, Long.MAX_VALUE); displaySizeMinAndMax(Float.TYPE, Float.SIZE, Float.MIN_VALUE, Float.MAX_VALUE); displaySizeMinAndMax(Double.TYPE, Double.SIZE, Double.MIN_VALUE, Double.MAX_VALUE); } public static void displaySizeMinAndMax(Class<?> type, int size, Number min, Number max) { System.out.printf("type:%-6s size:%-2s min:%-20s max:%s\n", type, size, min, max); } } The console output of executing PrimitiveTypeSizeMinMax can be seen here. Console Outputtype:byte size:8 min:-128 max:127 type:short size:16 min:-32768 max:32767 type:char size:16 min:0 max:65535 type:int size:32 min:-2147483648 max:2147483647 type:long size:64 min:-9223372036854775808 max:9223372036854775807 type:float size:32 min:1.4E-45 max:3.4028235E38 type:double size:64 min:4.9E-324 max:1.7976931348623157E308 Related Tutorials: |