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java二维数组3*3螺旋矩阵实例，请解释下循环的过程
public class T {
public static void main(String[] args) {
int i,j;
int[][] a = {{1,1,1},{2,2,2},{3,3,3}};
int[][] b = new int[3][3];
System.out.print(“初始矩阵：\n”);
for(i=0;i3;i++) {
for(j=0;j3;j++) {
System.out.print(a[i][j]+” “);
}
System.out.print(“\n”);
}
System.out.print(“转置矩阵：\n”);
for(i=0;i3;i++) {
for(j=0;j3;j++) {
b[i][j] = a[j][i];
System.out.print(b[i][j]+” “);
}
System.out.print(“\n”);
}
}
}
java螺旋矩阵求助！
package cn.com.micc.javatwo; //根据实际情况修改
//蜗牛螺旋矩阵 请仔细研究矩阵阶数变化时数据的迁移规律
//上一阶矩阵会”整体”向右上或左下移动
public class AntiClockWiseArray {
public static int[][] getResult(int n) {
int[][] n1 = new int[1][1];
n1[0][0] = 1;
if (n == 1)
return n1;
int[][] result = new int[n][n];
int[][] temp = getResult(n – 1);
if (0 == (n – 1) % 2)
result = LeftDownMove(temp, n – 1); //n-1阶矩阵向左下移动
else
result = RightUpMove(temp, n – 1); //n-1阶矩阵向右上移动
return result;
}
public static int[][] LeftDownMove(int[][] in, int moment) {
int temp = moment * moment;
int nums = moment * 2 + 1;
int[][] out = new int[moment + 1][moment + 1];
//新矩阵补入上一阶矩阵的值
for (int i = 0; i moment; ++i)
for (int j = 0; j moment; ++j)
out[i + 1][j] = in[i][j];
//两个循环添加新矩阵新值
for (int k = 0; k moment + 1; ++k)
out[0][k] = temp + nums – k;
for (int l = 1; l moment + 1; ++l)
out[l][moment] = temp + nums – moment – l;
return out;
}
public static int[][] RightUpMove(int[][] in, int moment) {
int temp = moment * moment;
int nums = moment * 2 + 1;
int[][] out = new int[moment + 1][moment + 1];
//新矩阵补入上一阶矩阵的值
for (int i = 0; i moment; ++i)
for (int j = 0; j moment; ++j)
out[i][j + 1] = in[i][j];
//两个循环添加新矩阵新值
for (int k = 0; k moment + 1; ++k)
out[k][0] = temp + 1 + k;
for (int l = 1; l moment + 1; ++l)
out[moment][l] = temp + moment + 1 + l;
return out;
}
public static void printArray(int[][] temp, int n) {
//格式化打印矩阵
for(int i = 0; i n; ++i)
{
for(int j = 0; j n; ++j)
System.out.printf(“%5d”, temp[i][j]);
System.out.println();
}
}
public static void main(String[] args) {
printArray(getResult(6), 6); //输入阶数
}
}
output:
10阶
82 81 80 79 78 77 76 75 74 73
83 50 49 48 47 46 45 44 43 72
84 51 26 25 24 23 22 21 42 71
85 52 27 10 9 8 7 20 41 70
86 53 28 11 2 1 6 19 40 69
87 54 29 12 3 4 5 18 39 68
88 55 30 13 14 15 16 17 38 67
89 56 31 32 33 34 35 36 37 66
90 57 58 59 60 61 62 63 64 65
91 92 93 94 95 96 97 98 99100
怎么编写JAVA螺旋矩阵？
按照你的要求用Java编写的螺旋矩阵程序如下:
public class N {
public static void main(String[] args) {
final int N=4;
int a[][]=new int[N][N];
int num=1;
int i=0,j=0,m=0;
if(N%2==0)
m=N/2;
else
m=N/2+1;
for(i=0;i=m-1;i++){
for(j=i;j=N-i-1;j++){
a[i][j]=num;
num++;
}
for(j=i+1;j=N-i-1;j++) {
a[j][N-i-1]=num;
num++;
}
for(j=N-i-2;j=i;j–){
a[N-i-1][j]=num;
num++;
}
for(j=N-i-2;j=i+1;j–){
a[j][i]=num;
num++;
}
}
for(i=0;iN;i++){
for(j=0;jN;j++){
System.out.print(String.format(“%3d”,a[i][j]));
}
System.out.println();
}
}
}
运行结果:
1 2 3 4
12 13 14 5
11 16 15 6
10 9 8 7
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