Can anyone help me with Java 8 question (Java OCA 8 Programmer I Study Guide, Sybex)

[yogesh doshi]

public class RopeSwing {
 private static final String leftRope;
 private static final String rightRope;
 private static final String bench;
 private static final String name = "name";
 static {
 leftRope = "left";
 rightRope = "right";
 }
 static {
 name = "name";
 rightRope = "right";
 }
 public static void main(String[] args) {
 bench = "bench";
 }
 }

The answer is four error when I run this on Java 8 environment I found that 3 error were displayed.....The error at declaration of bench variable was not displayed..

[Roel De Nijs]

yogesh doshi wrote:The answer is four error when I run this on Java 8 environment I found that 3 error were displayed.....The error at declaration of bench variable was not displayed..

This topic discusses exactly the same question. So it's definitely worth reading

Hope it helps!
Kind regards,
Roel

PS. I wonder why you have posted the javac commands as a screenshot and not simply as a plain code snippet (don't forget to UseCodeTags )? If I want to compile (and execute) your code snippets, I know have to type them myself. And yes, I am (very) lazy So I'll be losing precious time which I could otherwise be spending on typing a nice reply... And another reason: attached images are not searchable using the search engine, some text or a code snippet definitely is.

[yogesh doshi]

What is the result of the following?
code=java]
1: public class Order {
2: static String result = "";
3: { result += "c"; }
4: static
5: { result += "u"; }
6: { result += "r"; }
7: }
1: public class OrderDriver {
2: public static void main(String[] args) {
3: System.out.print(Order.result + " ");
4: System.out.print(Order.result + " ");
5: new Order();
6: new Order();
7: System.out.print(Order.result + " ");
8: }
9: }
[/code]
I am not able to understand the flow of the code .....why ucer is coming for first new Test(); and not for second new Test();?

[Jeanne Boyarsky]

Yogesh,
Watch what is static and not. The static parts will only be run once.

[yogesh doshi]

yogesh doshi wrote:Why Line 17 returns false and Line 18 returns True ??

String a = "";
14: a += 2;
15: a += 'c';
16: a += false;
17: if ( a == "2cfalse") System.out.println("==");
18: if ( a.equals("2cfalse")) System.out.println("equals");

[Ganesh Patekar]

== compares references of objects and .equals compares contents of that String objects.

Each time you used + operator, String concatination is done which creates new String object so variable a refers to an object of String having "2cfalse" which has different object reference than reference of object created by Sting literal "2cfalse" so == returns false but .equals() returns true.

This might help you understand It, click here --->Strings, Literally by Corey McGlone

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