Java program print "*" in half diamond.

class t7
{
public static void main(String a[])
{
int i,j;
for(i=1;i<=4;i++)
{
for(j=1;j<=i;j++)
{
System.out.print("*");
}
System.out.println(" ");
}
for(i=4-1;i>=1;i--)
{
for(j=1;j<=i;j++)
{
System.out.print ("*");
}
System.out.println (" ");
}
}
}