Java输出菱形

代码1：
public static void main(String[] args) {
int s = 20;
for (int i = 1; i < 20; i += 2) {
s–;
for (int t = s; t >= 1; t–) {
System.out.print(" “);
}
for (int n = 1; n <= i; n++) {
System.out.print(”“);
}
System.out.println();
}
for (int i = 17; i >= 1; i -= 2) {
s++;
for (int t = s; t >= 1; t–) {
System.out.print(” “);
}
for (int n = 1; n <= i; n++) {
System.out.print(”");
}
System.out.println();
}

}

代码二：
public static void main(String[] args) {
int s = 20;
for (int m = 1; m <= 20; m += 2) {
System.out.println(" ".repeat(–s) + ““.repeat(m));
}
for (int m = 17; m >= 1; m -= 2) {
System.out.println(” ".repeat(++s) + "”.repeat(m));
}
}