代码展示：

public static void main(String[] args) {
		int[] a = {62,36,75,135,134,34,63,63,208};
		BucketSort(a);
		System.out.println(Arrays.toString(a));
	}

	private static void BucketSort(int[] a) {

		         int weishu = 0;
		         int[][] bucket = new int[10][a.length];
		         int[] index = new int[10];//记录每个桶大小
                 for(int ai:a){
                	 String ais = (ai+"");
                	 weishu = ais.length()>weishu?ais.length():weishu;
                 }
                 //塞入桶中
                 for(int ai:a){
                	 int zuigaowei = (int) (ai/Math.pow(10,weishu-1)%10);
                	 int k = index[zuigaowei]-1;
                	 //插入排序
                	 while (k>=0&&ai<bucket[zuigaowei][k]) {
						bucket[zuigaowei][k+1] = bucket[zuigaowei][k];
						k--;
						
					}
                	 bucket[zuigaowei][k+1] = ai; 
                	 index[zuigaowei]++;
                 }
                 int indexa = 0;
                 for(int i=0;i<a.length;i++){
                	 for(int j=0;j<index[i];j++){
                		  a[indexa] = bucket[i][j];
                		  indexa++;
                	 }
                 }
		
	}