mutable and immutable

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java

What is the result of the following program execution? class MyLink { public MyLink() { str = "New"; } public String str; } public class Test { public static void main(String[] args) { MyLink b1 = new MyLink(); MyLink b2 = b1; b2.str = "My String"; System.out.println(b1.str); String a1 = "Test"; String a2 = a1; System.out.println(a2); a1 = "Not a Test"; System.out.println(a2); } }

mutable and immutable

java

What will be printed as a result of the following code execution? public class Test { public static void main(String[] args) { int i = 1; add(i++); System.out.println(i); } static void add(int i) { i += 2; } }

mutable and immutable

java

What will be displayed to console after the following code is executed? public class Test { public static void main(String[] args) { String s = new String("ssssss"); StringBuffer sb = new StringBuffer("bbbbbb"); s.concat("-aaa"); sb.append("-aaa"); System.out.println(s); System.out.println(sb); } }

mutable and immutable

java

What will be printed out after the following code is compiled and executed? String d = "beekeeper"; d.substring(1,7); d = "w" + d; d.insert(3, "bee"); System.out.println(d);

mutable and immutable

java

What will be indicated in the console? public class D { public static void main(String[] args) { E e = new E(); e.someVariable = 100; e.doIt(e); System.out.println(e.someVariable); } } class E { public int someVariable = 10; public void doIt(E aE) { aE.someVariable++; } E() { } }

mutable and immutable

java

What will be displayed as a result of the following code compilation and execution? String x = "Java"; x.concat(" Rules!"); System.out.println("x = " + x); x.toUpperCase(); System.out.println("x = " + x); x.replace('a', 'X'); System.out.println("x = " + x);

mutable and immutable