Line: 13] error: ']' expected. I have a problem, when I create a new 2D array, I get an error. Please help me.

Question

0.00/5 (No votes)

See more:

I create a new 2D array, I get an error. I am new to 2D arrays, so I am not sure what I am supposed to fix.

What I have tried:

I tried adding another pair of brackets, but it did not work.
Here is my code:

`//test to see if the matrix is magic.
public boolean isMagic() { 
 int[][] matrix = new int[][][arraysize];(here)`
 `// loop starts at 0, then loop will go horizontally until it reaches the end of the row. Then it will go to the next column.` 
` for(int i =0; i< arraysize; i++){`
   `for(int x=0; x<arraysize; x++){`
     `matrix[i] +=matrixArray[i][x];`
     
   
`}
}`
 
   
`}
}`

Posted 25-Apr-20 8:37am

Tornado 9000

Updated 25-Apr-20 9:00am

Add a Solution

2 solutions

Solution 2

Quote:
Line: 13] error: ']' expected.

Look at your code:

Java

int[][] matrix = new int[][][arraysize];
// ^ here you say you want a 2d array
//                      ^ here you give 3 dimension
...
matrix[i] +=matrixArray[i][x];
//     ^ and here, there is only 1 dimension

Posted 25-Apr-20 9:01am

Patrice T

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2020-04-25T08:56:00

look at your code:

int[][] matrix = new int[][][arraysize];

You are declaring matrix as a two dimensional array of integers, and trying to assign a three dimensional array to it. That won't work, any more that you can fit a quart into a pint pot!
You also need to specify both dimensions of the 2D array when you create the actual instance and assign the space:

int[][] matrix = new int[arraysize][arraysize];

In addition, when you use it you need to reference both dimensions:

matrix[i][somethingHere] += matrixArray[i][x];