public class StringMisc
{
  public static void main(String args[]){
    String str;
    
    str = "Hello World";
    
    // length
    System.out.println(str+" has "+str.length()+" characters.");
    
    // charAt
    for(int i = str.length()-1; i >= 0; i--){
      System.out.println(str.charAt(i));
    }
    
    // startsWith/ends with
    System.out.println(str+" starts with Hello: "+str.startsWith("Hello"));
    System.out.println(str+" ends with orld: "+str.endsWith("orld"));
    
    // toUpperCase/toLowerCase
    System.out.println(str.toUpperCase());
    System.out.println(str.toLowerCase());
    
    // indexOf/lastIndexOf
    System.out.println(str.indexOf('e'));
    System.out.println(str.indexOf('o'));
    System.out.println(str.lastIndexOf('o'));
    System.out.println(str.lastIndexOf('a'));
    
    // substring
    System.out.println(str.substring(3, 9));
    System.out.println(str.substring(0, str.indexOf(' ')));
    System.out.println(str.substring(str.lastIndexOf(' ')+1, str.length()));
    
    // Integer parsing
    String s1 = "576";
    String s2 = "73";
    System.out.println(s1 + s2);
    System.out.println(Integer.parseInt(s1) + Integer.parseInt(s2));
    System.out.println(Integer.parseInt(str));
    
    // Double parsing
    s1 = "57.6";
    s2 = "7.3";
    System.out.println(s1+s2);
    System.out.println(Double.parseDouble(s1) + Double.parseDouble(s2));
    //System.out.println(Double.parseDouble(str));
  }
}