Java Help

[Kajamaz]

Well, i'm doing some questions in Java and i have some issues with some questions.

double rub[] = {23.0, -102.1, 88.23, 111, 12.02, 189.119, 299.88};

double dub[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};

Write a single line of code (using arraycopy) that will result in dub looking like this:

{1, 2, 3, 4, 111, 12.02, 189.119, 8, 9}

double[] zz, top = {12.1, 13.1, 14.1, 15.1, 18};

zz = top;

zz[2] = 99;

top[3] = 100.2;

Show what “both” arrays would look like at the completion of the above code.

char[] a, b;

a = “Groovy dude”.toCharArray( );

b = “I like this”.toCharArray( );

System.arraycopy(a, 1, b, 0, 4);

What do the two arrays look like at the completion of this code?

Assume the array myArray in #12 has been correctly sorted. What would be printed with

the following?

System.out.println( Arrays.binarySearch(myArray, 56) );

System.out.println( Arrays.binarySearch(myArray, 102) );

What does the following print?

int xc[] = {123, 97, -102, 17};

int pk[] = {123, 79, -102, 17};

int gs[] = {123, 97, -102, 17};

System.out.println( Arrays.equals(xc, pk) + “\n” + Arrays.equals(xc, gs));

I Cant Answer those 5 Questions, can someone answer them or one of them? For Some reason i get compiler issues.

[westin444]

double rub[] = {23.0, -102.1, 88.23, 111, 12.02, 189.119, 299.88};[/font]

double dub[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};[/font]

Write a single line of code (using arraycopy) that will result in dub looking like this:

{1, 2, 3, 4, 111, 12.02, 189.119, 8, 9}

System.arraycopy(rub,3,dub,4,3); //Copy 3 elements from rub starting at index 3 into dub starting at index 4.

double[] zz, top = {12.1, 13.1, 14.1, 15.1, 18};[/font]

zz = top;

zz[2] = 99;

top[3] = 100.2;

Show what “both” arrays would look like at the completion of the above code.

zz and top = {12.1,13.1,99,100.2,18}; //Since arrays are actually object references, so setting zz to top results in a reference.

char[] a, b;[/font]

a = “Groovy dude”.toCharArray( );

b = “I like this”.toCharArray( );

System.arraycopy(a, 1, b, 0, 4);

What do the two arrays look like at the completion of this code?

a = {G,r,o,o,v,y, ,d,u,d,e}

b = {r,o,o,v,k,e, ,t,h,i,s}

//Copies "roov" from Groovy into array b.

Assume the array myArray in #12 has been correctly sorted. What would be printed with

the following?

System.out.println( Arrays.binarySearch(myArray, 56) );

System.out.println( Arrays.binarySearch(myArray, 102) );

Where is #12?

What does the following print?

int xc[] = {123, 97, -102, 17};[/font]

int pk[] = {123, 79, -102, 17};[/font]

int gs[] = {123, 97, -102, 17};[/font]

System.out.println( Arrays.equals(xc, pk) + “\n” + Arrays.equals(xc, gs));

false, true

Since the _contents_ of the array xc != pk, and the contents of xc and gs are the same.

[Guest]

Cheating on Homework are we? hahaha jk mate!

[Mal]

> Cheating on Homework are we? hahaha jk mate!

That's why I didn't reply. Every question he gave is solvable without writing a single line of code in an IDE.

[Kajamaz]

> double rub[] = {23.0, -102.1, 88.23, 111, 12.02, 189.119, 299.88};[/font]
>
> double dub[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};[/font]
>
> Write a single line of code (using arraycopy) that will result in dub looking like this:
>
> {1, 2, 3, 4, 111, 12.02, 189.119, 8, 9}
>
> System.arraycopy(rub,3,dub,4,3); //Copy 3 elements from rub starting at index 3 into dub starting at index 4.
>
> double[] zz, top = {12.1, 13.1, 14.1, 15.1, 18};[/font]
>
> zz = top;
>
> zz[2] = 99;
>
> top[3] = 100.2;
>
> Show what “both” arrays would look like at the completion of the above code.
>
> zz and top = {12.1,13.1,99,100.2,18}; //Since arrays are actually object references, so setting zz to top results in a reference.
>
> char[] a, b;[/font]
>
> a = “Groovy dude”.toCharArray( );
>
> b = “I like this”.toCharArray( );
>
> System.arraycopy(a, 1, b, 0, 4);
>
> What do the two arrays look like at the completion of this code?
>
> a = {G,r,o,o,v,y, ,d,u,d,e}
>
> b = {r,o,o,v,k,e, ,t,h,i,s}
>
> //Copies "roov" from Groovy into array b.
>
> Assume the array myArray in #12 has been correctly sorted. What would be printed with
>
> the following?
>
> System.out.println( Arrays.binarySearch(myArray, 56) );
>
> System.out.println( Arrays.binarySearch(myArray, 102) );
>
> Where is #12?
>
> What does the following print?
>
> int xc[] = {123, 97, -102, 17};[/font]
>
> int pk[] = {123, 79, -102, 17};[/font]
>
> int gs[] = {123, 97, -102, 17};[/font]
>
> System.out.println( Arrays.equals(xc, pk) + “\n” + Arrays.equals(xc, gs));
>
> false, true
>
> Since the _contents_ of the array xc != pk, and the contents of xc and gs are the same.
>
> Thanks for the answers man but i want to know the code i should use to make this work!
>
> int pickle[] = {1, 2, 3, 4, 5, 6, 7, 8};
>
> Arrays.fill(pickle, -1);
>
> System.out.println( pickle[4] );
>
> Please can you write out the Full code including the class and the static void main, i cant get it to work :/

[Mal]

> Thanks for the answers man but i want to know the code i should use to make this work!
>
> int pickle[] = {1, 2, 3, 4, 5, 6, 7, 8};
>
> Arrays.fill(pickle, -1);
>
> System.out.println( pickle[4] );
>
> Please can you write out the Full code including the class and the static void main, i cant get it to work :/

You aren't going to learn anything by copying and pasting someone else's work.

[Ertzel]

Theres a big difference between help and just flat out doing it all for you. 314piwm gave you all of the code you need for those questions. You really should be able to create the files on your own…. This is clearly school work based on the questions and how they are layed out and you should already know how to setup the basics for classes and the main void....

[Kajamaz]

Im Asking you to help me and simply show me an example of that code working , the entire code… If i know with that example i can do the rest on my own :/

[Ertzel]

```

import java.util.*;

public class ClassName {

public static void main(String[] args) {

int pickle[] = {1, 2, 3, 4, 5, 6, 7, 8};

Arrays.fill(pickle, -1);

System.out.println( pickle[4] );

}

}

```

[Kajamaz]

OMG thats exactly what i had but i mispelled something in my code so it fked up :/

It was driving me nuts…

Thanks...

[JohnPony]

Bubble sort 

I just wanted to say that *Snicker*

You should really be researching these problems yourself, you will never learn anything having someone spoon feed this stuff to you.