java的各种数据类型的转换
?public class Primitive2String
{public static void main(String[] args) {String intStr = "123";//把一个特定字符串转换成int变量int it = Integer.parseInt(intStr);System.out.println(it);String floatStr = "4.56";//把一个特定字符串转换成float变量float ft = Float.parseFloat(floatStr);System.out.println(ft);//把一个float变量转换成String变量String ftStr = String.valueOf(2.345f);System.out.println(ftStr);//把一个double变量转换成String变量String dbStr = String.valueOf(3.344);System.out.println(dbStr);//把一个boolean变量转换成String变量String boolStr = String.valueOf(true);System.out.println(boolStr.toUpperCase());}}此外，在API上面找到一些，可以参考一下string->byteByte static byte parseByte(String s) byte->string Byte static String toString(byte b) char->string Character static String to String (char c) string->Short Short static Short parseShort(String s) Short->String Short static String toString(Short s) String->Integer Integer static int parseInt(String s) Integer->String Integer static String tostring(int i) String->Long Long static long parseLong(String s) Long->String Long static String toString(Long i) String->Float Float static float parseFloat(String s) Float->String Float static String toString(float f) String->Double Double static double parseDouble(String s) Double->StringDouble static String toString(Double)?