Question

用java语言for循环做一个菱形怎么做，求讲解

Answer 1

public static void main(String[] args) {
for(int i = 1;i <= 5;i++){
for(int j = 1;j <= 5-i ;j++){
System.out.print(" ");
}
for(int k = 1;k <= i*2 -1 ;k++){
System.out.print("*");
}
System.out.println("");
}
for(int i = 2;i <= 5;i++){
for(int k = 0;k < i-1 ;k++){
System.out.print(" ");
}
for(int j = 0;j <= 10-2*i ;j++){
System.out.print("*");
}
System.out.println("");
}
}

Answer 2

		for(int m=-8;m<=8;m=m+2) {
			for(int j=1;j<=(Math.abs(m))/2;j++) {
				System.out.print(" ");
			}
			for(int j=1;j<=9-Math.abs(m);j++) {
				System.out.print("*");
			}
			for(int j=1;j<=(Math.abs(m)-1)/2;j++){
				System.out.print(" ");
			}
			System.out.println();
		}

Answer 3

for (int i = 0; i < 5; i++) {
for (int j = 0; j <i; j++) {
System.out.print(" ");
}
for (int j = 0; j < 5; j++) {
System.out.print("*");
}
System.out.println();
}
}
}