for - <很急!!>Java程式高手拜託幫忙解題<20點!!>

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import java.util.*;

public class twoarysort {

static int temp = 0;

public static void main(String[] args) {

int[][] numbers = new int[2][20];

Scanner in = new Scanner(System.in);

for (int i = 0; i < 2; i++) {
for (int j = 0; j < 20; j++) {
System.out.printf("請輸入%d個陣列的第%d個數", i + 1, j + 1);
int keyin = in.nextInt();
numbers[i][j] = keyin;
}
}
System.out.println("合併後陣列元素");
int[] k = arysort(numbers);
for (int ss : k)
System.out.print(ss + " ");
}

public static int[] arysort(int[][] ary) {
int[] nary = new int[40];
int k = 0;
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 20; j++) {
nary[k] = ary[i][j];
k++;
}
}
return insertion(nary);
}

public static int[] insertion(int[] number) {
for (int j = 1; j < number.length; j++) {
int tmp = number[j];
int i = j - 1;
while (i != -1 && tmp < number[i]) {
number[i + 1] = number[i];
i--;
}

number[i + 1] = tmp;
}
return number;
}
}