something like this
StringTokenizer st = new StringTokenizer("34 55 64");
x = Integer.parseInt(st.nextToken());
y = Integer.parseInt(st.nextToken());
z = Integer.parseInt(st.nextToken());
As pointed out in comments, StringTokenizer is a legacy class (Not deprecated though) and can be replaced with the following code
String line = "34 55 64 ";
String []splits = line.trim().split("\\s+");
x = Integer.parseInt(splits[0]);
y = Integer.parseInt(splits[1]);
z = Integer.parseInt(splits[2]);