JAVA软件题目求解~！java数组问题

public class Test {
public static void main(String[] args) {
for(int i=1;i<=8;i++){
for(int j=1;j<=i;j++){
System.out.print("*");
for(int n=1;n<i;n++){
System.out.print(".");
}
}
System.out.println("");
}
}
}

for (int i = 1;i <= 8;i++){
for (int j = 1;j <= i;j++){
System.out.print("*");
for (int k = 1;k < i;k++){
System.out.print(".");
}
}
System.out.println();
}

public class Tet
{
public static void main(String[] args)
{
Tet t= new Tet();
t.haha(6);
}

public void haha(int x)
{
for(int i=1;i<=x; i++)
{
for(int j=0;j<i-1;j++)
{
System.out.print("*");
for(int k=1;k<i-1;k++)
{
System