java打印等腰三角形。

public class Exp4 {
public static void main(String[] args) {
int i, j;
int row = 5;
for(i=1; i<=row; i++){
for(j=1; j<=i-1; j++){
System.out.print(" ");
}
for(j=1; j<= row+1-i; j++) {
System.out.print("* ");
}
System.out.println();
}
//----------------------------------------------------
for ( i = 1; i <= row; i++) {
for ( j = i; j < row; j++) {
System.out.print(" ");
}

for (int k = 1; k <=   i ; k++) {
System.out.print("* ");
}

System.out.println();
}

//----------------------------------------------------

for ( i = 1; i <= row; i++) {
for ( j = i; j < row; j++) {
System.out.print(" ");
}

for (int k = 1; k <= 2 * i - 1; k++) {
System.out.print("*");
}

System.out.println();
}
}

}