Convert integer to zero-padded binary string

Question

when converting int to binary, how to output it to 8 character, currently it only display 1 and short of the 7 zeros

code

int x = 1;
String bin = Integer.toBinaryString(x);
System.Out.Println(bin);

example output to 0000 0001

Answer 1

I am not sure if that is what you mean but how about something like

String.format("%8s", Integer.toBinaryString(1)).replace(' ', '0')

will generate 00000001

Answer 2

您可以使用零填充二进制字符串。

String bin = String.format("%8s", Integer.toBinaryString(x).replace(' ', '0');

Answer 3

转换，检查结果长度，如果<8则添加零。