String s="Hello";
System.out.println(s.length());
System.out.println(s.substring(0,1));
System.out.println(s.substring(0,2));
System.out.println(s.substring(0,3));
System.out.println(s.substring(0,4));
System.out.println(s.substring(0,5));


System.out.println(s.substring(4,5));
System.out.println(s.substring(3,5));
System.out.println(s.substring(2,5));
System.out.println(s.substring(1,5));
System.out.println(s.substring(0,5));

Hi Friend,

Try the following code:

class StringPattern
{
public static void main(String[] args) {
String st="Hello";
for(int i=1;i<6;i++){
String sub1=st.substring(0,i);
System.out.println(" "+sub1);
}
st = new StringBuffer(st).reverse().toString();
for(int i=1;i<6;i++){
String sub1=st.substring(0,i);
System.out.println(" "+sub1);
}
}
}

Thanks