StringDemo.java - 1 literal strings 2 immutable objects...

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// 1. literal strings // 2. immutable objects public class StringDemo { public static void main(String[] args) { // String literals are stored as String objects in the memory // special case: 3 occurrences of one String literal in the code are reference to ONE String object String a = "[email protected]", b = "[email protected]", c = "[email protected]"; System.out.println( a + "\n" + b + "\n" + c ); if ( a == c ) System.out.println( "... special case: a and c reference the SAME String object in the memory" ); if ( a.equals(b) ) System.out.println( "... both String objects have the SAME CHARACTER CONTENTS" ); // Part 2 String s1 = new String( "[email protected]" ); // another String object is created; // it references the String literal "[email protected] if ( a == s1 ) System.out.println( "a and s1 REFERENCE the same String object" ); else System.out.println( "a and s1 do NOT reference the same String object" ); if ( a.equals(s1) ) System.out.println( "... both String objects have the SAME character CONTENTS" ); // Part 3 String s2 = new String( "Albert Einstein" );
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