Review the following Java example to convert a negative integer in binary string back to an integer type. String binary = Integer.toBinaryString(-1); // convert -1 to binary // 11111111 11111111 11111111 11111111 (two’s complement) int number = Integer.parseInt(binary, 2); // convert negative binary back to integer System.out.println(number); // output ?? The result is NumberFormatException! Exception […]
In Java, Sign extension will kick in if we are doing the following stuff: Widening primitive conversion – Cast from one type to another, which involves increasing the bits of the original type, for example, cast byte (8 bits) to int (32 bits). Bitwise right shift by n bit >> n. The sign extension is […]
In programming, bitwise shift operators, >> means arithmetic right shift, >>> means logical right shift, the differences: >>, it preserves the sign (positive or negative numbers) after right shift by n bit, sign extension. >>>, it ignores the sign after right shift by n bit, zero extension. To work with bitwise shift operators >> and […]
In Java, byte is an 8-bit signed (positive and negative) data type, values from -128 (-2^7) to 127 (2^7-1). For unsigned byte, the allowed values are from 0 to 255. Java doesn’t have unsigned bytes (0 to 255). To make an unsigned byte, we can cast the byte into an int and mask (bitwise and) […]
