StringLiteralUniqueness.java
// This code example is from the following source: // // Book Title: Programming with Objects, A Comparative Presentation // of Object Oriented Programming with C++ and Java // // Chapter: Chapter 4 ---- Strings // // Section: Section 4.4 -- Strings In Java // // The links to the rest of the code in this book are at // // http://programming-with-objects.com/pwocode.html // // For further information regarding the book, please visit // // http://programming-with-objects.com // //StringLiteralUniqueness.java class X { public static String strX = "hello"; } //(A) class Y { public static String strY = "hello"; } //(B) class Z { public static String strZ = "hell" + "o"; } //(C) class Test { public static void main( String[] args ) { // output: true System.out.println( X.strX == Y.strY ); //(D) // output: true System.out.println( X.strX == Z.strZ ); //(E) String s1 = "hel"; String s2 = "lo"; // output: false System.out.println( X.strX == ( s1 + s2 ) ); //(F) // output: true System.out.println( X.strX == (s1 + s2).intern() ); //(G) } }
Maintained by John Loomis, updated Mon Jan 01 17:11:48 2007