public class TestStrings {

  public static void main (String[] argv)  // Actually, an array of strings
  {
    String m = "I had tea in the Oval Office that Monday";
    String b = "I do not recall having tea with her";
    System.out.println ("Monica: " + m // Note concatenation
                        + "\n" +        // Expressions can spill over
                        "Bill: " + b); // lines but strings may not.

    int i = b.length(); // length() method returns # chars in string

    System.out.println ("String \"" // Note backslash-quote
                        + b + "\" has length " 
                        + i  // Automatic conversion to string
                        + " chars");

    // Assignment:
    String b2 = b;     // Actually, a pointer. But since strings are
                       // immutable, there's no problem.
    System.out.println ("b2: " + b2);

    // Modifying strings using String methods:
    String b3 = b.substring (0,6);  // First 7 letters
                                    // Must extract into a new string
    System.out.println ("b3: " + b3);

    char c1 = b.charAt (0);
    char c2 = b.charAt (2);
    System.out.println ("c1+c2: " + c1 + c2);

    if (b2.equals(b))
      System.out.println ("b2 equals b");

    // Short-cut operator:
    b2 += b2;                 // Concatenate a string with itself.
    System.out.println ("b2: " + b2);
  }
}