The java.lang.Double.byteValue() is a built-in method in Java that returns the value of this Double as a byte(by casting to a byte). Basically it used for narrowing primitive conversion of Double type to a byte value.
public byte byteValue()
Parameters: The function does not accept any parameter.
Return Value: This method returns the double value represented by this object converted to type byte.
Input : 12 Output : 12 Input : 1023 Output : -1
Below programs illustrates the use of java.lang.Double.byteValue() function:
Byte Value of num = -1 Byte Value of num = 12
Program 2 : Demonstrates the byte value for a negative number.
Byte Value of num = 1 Byte Value of num = -12
Program 3 : When a decimal value is passed in argument.
Byte Value of num = 11 Byte Value of num = 6
Program 4 : When a string value is passed as argument.
prog.java:9: error: incompatible types: String cannot be converted to Double Double value = "45"; ^ 1 error
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