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java.lang.Objectorg.springframework.util.NumberUtils
public abstract class NumberUtils
Miscellaneous utility methods for number conversion and parsing. Mainly for internal use within the framework; consider Jakarta's Commons Lang for a more comprehensive suite of string utilities.
Constructor Summary | |
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NumberUtils()
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Method Summary | ||
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static
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convertNumberToTargetClass(java.lang.Number number,
java.lang.Class<T> targetClass)
Convert the given number into an instance of the given target class. |
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static
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parseNumber(java.lang.String text,
java.lang.Class<T> targetClass)
Parse the given text into a number instance of the given target class, using the corresponding decode / valueOf methods. |
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static
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parseNumber(java.lang.String text,
java.lang.Class<T> targetClass,
java.text.NumberFormat numberFormat)
Parse the given text into a number instance of the given target class, using the given NumberFormat. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public NumberUtils()
Method Detail |
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public static <T extends java.lang.Number> T convertNumberToTargetClass(java.lang.Number number, java.lang.Class<T> targetClass) throws java.lang.IllegalArgumentException
number
- the number to converttargetClass
- the target class to convert to
java.lang.IllegalArgumentException
- if the target class is not supported
(i.e. not a standard Number subclass as included in the JDK)Byte
,
Short
,
Integer
,
Long
,
BigInteger
,
Float
,
Double
,
BigDecimal
public static <T extends java.lang.Number> T parseNumber(java.lang.String text, java.lang.Class<T> targetClass)
decode
/ valueOf
methods.
Trims the input String
before attempting to parse the number.
Supports numbers in hex format (with leading "0x", "0X" or "#") as well.
text
- the text to converttargetClass
- the target class to parse into
java.lang.IllegalArgumentException
- if the target class is not supported
(i.e. not a standard Number subclass as included in the JDK)Byte.decode(java.lang.String)
,
Short.decode(java.lang.String)
,
Integer.decode(java.lang.String)
,
Long.decode(java.lang.String)
,
decodeBigInteger(String)
,
Float.valueOf(java.lang.String)
,
Double.valueOf(java.lang.String)
,
BigDecimal.BigDecimal(String)
public static <T extends java.lang.Number> T parseNumber(java.lang.String text, java.lang.Class<T> targetClass, java.text.NumberFormat numberFormat)
String
before attempting to parse the number.
text
- the text to converttargetClass
- the target class to parse intonumberFormat
- the NumberFormat to use for parsing (if null
,
this method falls back to parseNumber(String, Class)
)
java.lang.IllegalArgumentException
- if the target class is not supported
(i.e. not a standard Number subclass as included in the JDK)NumberFormat.parse(java.lang.String, java.text.ParsePosition)
,
convertNumberToTargetClass(java.lang.Number, java.lang.Class)
,
parseNumber(String, Class)
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