数组和List的转换:
List<Integer> l = new ArrayList<Integer>();
l.add(1);
l.add(2);
l.add(3);
Integer[] ints = l.toArray(new Integer[0]);
List<Integer> l2 = Arrays.asList(ints);
assert l.equals(l2);
System.out.println("ok");
数字类型转换成字符串型:
String s = String.valueOf(value);
数字对象转换成字符串型
Long l = new Long(10);
String s = l.toString();
数字类型/字符串转换成数字对象:
byte b = 169;
String b = "169";
Byte bo = new Byte( b );
short t = 169;
String b = "169";
Short to = new Short( t );
int i = 169;
String b = "169";
Integer io = new Integer( i );
long l = 169;
String b = "169";
Long lo = new Long( l );
float f = 169f;
String b = "169";
Float fo = new Float( f );
double d = 169f;
String b = "169";
Double dObj = new Double( d );
字符串型转换成各种数字类型:
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 );
数字对象转换成数字类型:(*o为一数字对象)
b = bo.byteValue();
t = to.shortValue();
i = io.intValue();
l = lo.longValue();
f = fo.floatValue();
d = dObj.doubleValue();
posted on 2006-12-12 10:19
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