java convert ip to long

To convert an IP address to a long value in Java, you can use the InetAddress class to parse the IP address as a byte array, and then use bit shifting and bitwise OR operations to combine the bytes into a single long value.

Here is an example of how you can convert an IP address to a long value in Java:

String ipAddress = "192.168.0.1";
InetAddress inetAddress = InetAddress.getByName(ipAddress);
byte[] bytes = inetAddress.getAddress();
long value = ((bytes[0] & 0xffL) << 24) | ((bytes[1] & 0xffL) << 16) | ((bytes[2] & 0xffL) << 8) | (bytes[3] & 0xffL);

In this example, we have a String called ipAddress that contains an IP address. We use the InetAddress.getByName method to parse the IP address as an InetAddress object, and then use the getAddress method to get the address as a byte array. We then use bit shifting and bitwise OR operations to combine the bytes into a single long value, which we assign to a long variable called value.