StringsDemo.java

packageLecture7;

publicclassStringsDemo {

publicstaticvoidmain(String[] args) {

Stringstr = "Hello";
System.out.println(str); // Hello

System.out.println(str.charAt(0)); // H
System.out.println(str.charAt(1)); // e

System.out.println(str.length()); // 5
System.out.println(str.charAt(str.length() - 1)); // o

System.out.println(str.substring(2)); // llo
System.out.println(str.substring(1, 3)); // el
System.out.println(str.substring(2, 2)); // blank space
System.out.println("i am executed");

System.out.println(str.startsWith("Hel")); // true
System.out.println(str.startsWith("hel")); // false
System.out.println(str.startsWith("HE")); // false

Strings1 = "hello";
Strings2 = "hello";
Strings3 = s1;
Strings4 = newString("hello");

System.out.println(s1 == s2); // true
System.out.println(s1 == s3); // true
System.out.println(s2 == s3); // true
System.out.println(s1 == s4); // false

System.out.println(s1.equals(s2)); // true
System.out.println(s1.equals(s3)); // true
System.out.println(s1.equals(s4)); // true

/*
 * == checks for the address, here s1, s2, s3 are pointing to same
 * address in string pool. s4 is created outside of string pool
 * 
 * .equals() checks for the content
 */
 }
}