>>112
こんなのでどうよ？
HashMap<String,int[]> hm = new HashMap<String,int[]>();
int[] x0 = new int[10]; hm.put("x0", x0);
int[] x1 = new int[11]; hm.put("x1", x1);
int[] x2 = new int[12]; hm.put("x2", x2);
int[] x3 = new int[13]; hm.put("x3", x3);
for (int i = 0; i < 4; i++) {
int[] v = hm.get("x" + String.valueOf(i));
System.out.println(v.length);
}