例题

求一个3*3矩阵对角线元素之和。

有一个已经排好序的数组。现输入一个数，要求按原来的规律将它插入数组中。

package a;
import java.util.*;
public class ScannerTest {
public static void main(String[] args) {
int[] a = new int[] {1,2,6,14,5,36,37,55};
int[] b = new int[a.length + 1];
int t1 = 0, t2 = 0;
int i = 0;
Scanner s = new Scanner(System.in);
System.out.print("请输入一个整数：");
int num = s.nextInt();
if (num >= a[a.length - 1]) {
b[b.length - 1] = num;
for (i = 0; i < a.length; i++) {
b[i] = a[i];
}
} else {
for (i = 0; i < a.length; i++) {
if (num >= a[i]) {
b[i] = a[i];
} else {
b[i] = num;
break;
}
}
for (int j = i + 1; j < b.length; j++) {
b[j] = a[j - 1];
}
}
for (i = 0; i < b.length; i++) {
System.out.print(b[i] + " ");
}
}
}