String a = "fdafa fdskafii 5345353 fdskfjdaskf";
String[] b = new String[4];
int pos = 0;
for (int i = 0; i < b.length; i++) {
a = a.trim();
pos = a.indexOf(" ");
if (pos==-1) b[i] = a;
else{
b[i] = a.substring(0,pos);
a = a.substring(pos);
}
System.out.println(b[i]);
}