爪哇郎。Java 中的 Long.byteValue()方法，示例
原文:https://www . geesforgeks . org/Java-lang-long-byteevalue-method-Java-examples/
java . lang . Long . byteevalue()是 Java 中的一个内置函数，它将这个 Long 的值作为一个字节返回。
语法:
public byte byteValue()
Parameters: The function does not accept any parameter.
Return :
This method returns the numeric value
represented by this object after conversion to byte type.
示例:
Input : 12
Output : 12
Input : 1023
Output : -1
下面的程序说明了 java.lang.Long.byteValue()函数:
程序 1 :
// Java program that demonstrates the use of
// Long.byteValue() function
// include lang package
import java.lang.*;
public class GFG {
public static void main(String[] args)
{
Long value = 1023l;
// returns the value of Long as a byte
byte byteValue = value.byteValue();
System.out.println("Byte Value of num = " + byteValue);
// 2nd example
value = 12l;
byteValue = value.byteValue();
System.out.println("Byte Value of num = " + byteValue);
}
}
输出:
Byte Value of num = -1
Byte Value of num = 12
程序 2 : 演示负数的字节值
// Java program that demonstrates the use of
// Long.byteValue() function
// negative number
// include lang package
import java.lang.*;
public class GFG {
public static void main(String[] args)
{
Long value = -1023l;
// returns the value of Long as a byte
byte byteValue = value.byteValue();
System.out.println("Byte Value of num = " + byteValue);
// 2nd example
value = -12l;
byteValue = value.byteValue();
System.out.println("Byte Value of num = " + byteValue);
}
}
输出:
Byte Value of num = 1
Byte Value of num = -12
程序 3 : 当一个十进制值在参数中传递时。
// Java program that demonstrates the use of
// Long.byteValue() function
// decimal number
// include lang package
import java.lang.*;
public class GFG {
public static void main(String[] args)
{
Long value = 11.24;
// returns the value of Long as a byte
byte byteValue = value.byteValue();
System.out.println("Byte Value of num = " + byteValue);
}
}
输出:
prog.java:13: error: incompatible types: double cannot be converted to Long
Long value = 11.24;
程序 4 : 当一个字符串值在参数中传递时。
// Java program that demonstrates the use of
// Long.byteValue() function
// string number
// include lang package
import java.lang.*;
public class GFG {
public static void main(String[] args)
{
Long value = "24";
// returns the value of Long as a byte
byte byteValue = value.byteValue();
System.out.println("Byte Value of num = " + byteValue);
}
}
输出:
prog.java:13: error: incompatible types: String cannot be converted to Long
Long value = "24";
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