带有示例的Java Long decode() 方法
Java .lang.Long.decode()是Java中的内置函数,可将String 解码为Long。它接受十进制、十六进制和八进制数。
句法:
public static Long decode(String number) throws NumberFormatException
Parameter:
number- the number that has to be decoded into a Long.
错误和异常:
- NumberFormatException:如果 String 不包含可解析的 long,则程序返回此错误。
返回:它返回解码后的字符串。
程序1:下面的程序演示了函数的工作。
// Java program to demonstrate
// of java.lang.Long.decode() method
import java.lang.Math;
class GFG {
// driver code
public static void main(String args[])
{
// demonstration of function
Long l = new Long(14);
String str = "54534";
System.out.println("Number = "
+ l.decode(str));
}
}
输出:
Number = 54534
程序 2:程序演示了使用 decode()函数的转换
// Java program to demonstrate
// of java.lang.Long.decode() method
import java.lang.Math;
class GFG {
// driver code
public static void main(String args[])
{
// demonstration of conversions
String decimal = "10"; // Decimal
String hexa = "0XFF"; // Hexa
String octal = "067"; // Octal
// convert decimal val to number using decode() method
Integer number = Integer.decode(decimal);
System.out.println("Decimal [" + decimal + "] = " + number);
number = Integer.decode(hexa);
System.out.println("Hexa [" + hexa + "] = " + number);
number = Integer.decode(octal);
System.out.println("Octal [" + octal + "] = " + number);
}
}
输出:
Decimal [10] = 10
Hexa [0XFF] = 255
Octal [067] = 55
程序 3:程序演示错误和异常。
// Java program to demonstrate
// of java.lang.Long.decode() method
import java.lang.Math;
class GFG {
// driver code
public static void main(String args[])
{
// demonstration of errorand exception when
// a non-parsable Long is passed
String decimal = "1A";
// throws an error
Integer number = Integer.decode(decimal);
System.out.println("string [" + decimal + "] = " + number);
}
}
输出:
Exception in thread "main" java.lang.NumberFormatException: For input string: "1A"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.valueOf(Integer.java:740)
at java.lang.Integer.decode(Integer.java:1197)
at GFG.main(File.java:16)