Java: Strings

String Methods:

String txt = "Hello World";
System.out.println(txt.toUpperCase());   // Outputs "HELLO WORLD"
System.out.println(txt.toLowerCase());   // Outputs "hello world"

String txt = "Please locate where 'locate' occurs!";
System.out.println(txt.indexOf("locate")); // Outputs 7

System.out.println(txt.indexOf("p")); // Outputs 0
System.out.println(txt.indexOf("l")); // Outputs 1

String firstName = "John ";
String lastName = "Doe";
System.out.println(firstName.concat(lastName));

String x = "10";
String y = "20";
String z = x + y;  // z will be 1020 (a String)

String x = "10";
int y = 20;
String z = x + y;  // z will be 1020 (a String)

Special Characters