合并两个有序数组，合并后数组仍有序

 public static int[] twoArray(int[] a, int[] b) {
    	int i =0;
    	int j = 0;
    	int k = 0;
    	int aLen = a.length;
    	int bLen = b.length;
    	int[] arra = new int[aLen + bLen];
    	while (i < aLen && j < bLen) {
    		if (a[i] < b[j]) {
    			arra[k] = a[i];
    			i++;
    			
    		}  else {
    			arra[k] = b[j];
    			j++;
    		}
    		k++;	
    	}
    	
    	if (i == aLen) {
    		while(j < bLen) {
    			arra[k] = b[j];
    			k++;
    			j++;
    		}
    	}
    	
    	if (j == bLen) {
    		while(i < aLen) {
    			arra[k] = a[i];
    			k++;
    			i++;
    		}
    	}
    	for(int m = 0; m < arra.length; m++) {
    		System.out.print(arra[m] + ",");
    	}
    	
    	return arra;
    }
    
    public static void main(String[] args) {
		int[] a = {1,2,6,9};
		int[] b = {5,7,8,9,10};
		twoArray(a, b);
    }