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public class CacheSizes {
/**
* Returns the size in bytes of a basic Object. This method should only
* be used for actual Object objects and not classes that extend Object.
*
* @return the size of an Object.
*/
public static int sizeOfObject() {
return 4;
}
/**
* Returns the size in bytes of a String.
*
* @param string the String to determine the size of.
* @return the size of a String.
*/
public static int sizeOfString(String string) {
if (string == null) {
return 0;
}
return 4 + string.length()*2;
}
/**
* Returns the size in bytes of a primitive int.
*
* @return the size of a primitive int.
*/
public static int sizeOfInt() {
return 4;
}
/**
* Returns the size in bytes of a primitive char.
*
* @return the size of a primitive char.
*/
public static int sizeOfChar() {
return 2;
}
/**
* Returns the size in bytes of a primitive boolean.
*
* @return the size of a primitive boolean.
*/
public static int sizeOfBoolean() {
return 1;
}
/**
* Returns the size in bytes of a primitive long.
*
* @return the size of a primitive long.
*/
public static int sizeOfLong() {
return 8;
}
/**
* Returns the size in bytes of a primitive double.
*
* @return the size of a primitive double.
*/
public static int sizeOfDouble() {
return 8;
}
/**
* Returns the size in bytes of a Date.
*
* @return the size of a Date.
*/
public static int sizeOfDate() {
return 12;
}
/**
* Returns the size in bytes of a Properties object