Data types conversions in java

In the last weeks I've been programming in Java for 2 school works and others 3 more projects, I'm the type of person how prefer thing more low-level, so I can say that I never used it so much in so little time. The good thing about that is that I'm finally learning many things about objects and events, it's just like a new world.

So I have been taking notes and I'll share a little about a thing that I always forget, how to convert between data types commonly used.

	byte	short	int	long	float
Byte	byteValue()	shortValue()	intValue()	longValue()	floatValue()
Short	byteValue()	shortValue()	intValue()	longValue()	floatValue()
Integer	byteValue()	shortValue()	intValue()	longValue()	floatValue()
Long	byteValue()	shortValue()	intValue()	longValue()	floatValue()
Float	byteValue()	shortValue()	intValue()	longValue()	floatValue()
Double	byteValue()	shortValue()	intValue()	longValue()	floatValue()
Boolean	(byte) ((a)?1:0)	(short) ((a)?1:0)	((a)?1:0)	(long) ((a)?1:0)	(float) ((a)?1:0)
String	Byte.parseByte(a)	Short.parseShort(a)	Integer.parseInt(a)	Long.parseLong(a)	Float.parseFloat(a)

	double	boolean	char	String
Byte	doubleValue()	!(compareTo(0)==0)	Character.forDigit(a,10)	String.ValueOf(a)
Short	doubleValue()	!(compareTo(0)==0)	Character.forDigit(a,10)	String.ValueOf(a)
Integer	doubleValue()	!(compareTo(0)==0)	Character.forDigit(a,10)	String.ValueOf(a)
Long	doubleValue()	!(compareTo(0)==0)	Character.forDigit(a,10)	String.ValueOf(a)
Float	doubleValue()	!(compareTo(0f)==0)	Character.forDigit(a,10)	String.ValueOf(a)
Double	doubleValue()	!(compareTo(0.0)==0)	Character.forDigit(a,10)	String.ValueOf(a)
Boolean	(double) ((a)?1:0)	a	((a)?’T’:’F’)	String.ValueOf(a)
String	Double.parseDouble(a)	!(compareTo(“0”)==0)	a.charAt(0);	String.ValueOf(a)

This explains how to convert from classes for primitive types, on the left side are the original classes and on top are the primitive types. Of course there are other important things, but is already a good summary.