public class AppStringBuildStringFormatr {

public static void main(String[] args) {

/* in java Strings are immutable, so you can never change it, this piece of code

* is also quite inefficient, because every time it looks like its appending

* but in reality it doesn't append instead we are reassigning the info variable,

* everytime we do this it doesnt append instead reassign, To handle this we have

* Spring builder class

*/

//inefficient code

String info = "";

info += "Hi Iam Liss";

info += " and ";

info += "me is cute";

System.out.println(info);

//efficient - since uses less memory

StringBuilder sb = new StringBuilder("");

sb.append("Liffe is me");

sb.append(" and ");

sb.append("Lovies Hanzu");

System.out.println(sb.toString());

StringBuilder s = new StringBuilder();

//method chaining is below

s.append("Hanzu is ").append(" a ").append("lion tamer.");

System.out.println(s.toString());

//in older code u can see string buffer when compared to string builder

//String formating

System.out.print("\tThis is tab.\nThis is new line.");

System.out.println("More Values.");

//%4d gives 4 space you can make it left allign with -

System.out.printf("This is integer %4d and left alligned number is %-5d\n",5,60);

for(int i =0;i<15;i++) {

System.out.printf("%2d: %s\n", i,"Here is some text");

}

//System.out.printf("This is string %s.",);

//floating formatting

System.out.printf("This is decimal %f\n",5.67);

System.out.printf("This is decimal %.2f\n",5.6799);

System.out.printf("This is decimal %.1f\n",235.6799);

System.out.printf("This is decimal %6.2f\n",235.6799);

//here 6 implies including all that is including 2,3,5,.,6,8

System.out.printf("This is decimal %6.1f\n",235.6799);

//here 6 implies including all that is including (blank),2,3,5,.,6, as we have

//mentioned .1 it cant take after it

System.out.printf("This is decimal %-6.1f\n",235.6799);

//here 6 implies including all that is including 2,3,5,.,6,8 and negetive means left

//assigning

}

}