各種數(shù)字類型轉(zhuǎn)換成字符串型：

String s = String.valueOf( value); // 其中 value 為任意一種數(shù)字類型。

字符串型轉(zhuǎn)換成各種數(shù)字類型：

String s = "169";
byte b = Byte.parseByte( s );
short t = Short.parseShort( s );
int i = Integer.parseInt( s );
long l = Long.parseLong( s );
Float f = Float.parseFloat( s );
Double d = Double.parseDouble( s );

數(shù)字類型與數(shù)字類對象之間的轉(zhuǎn)換：

byte b = 169;
Byte bo = new Byte( b );
b = bo.byteValue();

short t = 169;
Short to = new Short( t );
t = to.shortValue();

int i = 169;
Integer io = new Integer( i );
i = io.intValue();

long l = 169;
Long lo = new Long( l );
l = lo.longValue();

float f = 169f;
Float fo = new Float( f );
f = fo.floatValue();

double d = 169f;
Double dObj = new Double( d );
d = dObj.doubleValue();