2D boolean array creation and assigment.Compile time error

Question

public class Test {
    boolean[][] expectedResults = new boolean[8][2];
    expectedResults[0] = new boolean[] {false, false}; //00B
}

Gives me the following Compile Time error:

test.java:3: ']' expected
expectedResults[0] = new boolean[] {false, false}; //00B
^
test.java:3: ';' expected
expectedResults[0] = new boolean[] {false, false}; //00B
^
test.java:3: illegal start of type expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:3: expected expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:3: ';' expected expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:3: illegal start of type expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:3: expected expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:3: ';' expected expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:3: illegal start of type expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:3: expected expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:3: ';' expected expectedResults[0] = new boolean[] {false, false}; //00B
^ test.java:4: class, interface, or enum expected
}

Solved

Must be in a method!.

You haven't posted your actual code, because it doesn't match the error message. — Oliver Charlesworth
– Oliver Charlesworth, Commented Apr 4, 2012 at 9:59

MByD · Accepted Answer · 2012-04-04 10:00:14Z

5

The syntax is:

expectedResults[0] = new boolean[]{false, false};

Also, make sure you perform the assignment inside a method or static initialization block.

answered Apr 4, 2012 at 10:00

MByD

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1 Comment

MByD Over a year ago

See the second part of my answer. it should be in a method, not just in the class.

Eng.Fouad · Accepted Answer · 2012-04-04 10:04:55Z

0

You can creating an array like this {false, false}, only when you put it in the same line with the decleration (Array constants can only be used in initializers):

boolean[] expectedResults = {false, false}; // complies

While this does not compile:

boolean[] expectedResults;
expectedResults = {false, false}; // does not complie

instead use:

boolean[] expectedResults;
expectedResults = new boolean[]{false, false};

answered Apr 4, 2012 at 10:04

Eng.Fouad

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Comments

SSpoke · Accepted Answer · 2014-03-18 21:03:39Z

0

This is 8x2 boolean array initialization made easy.

  public boolean[][] expectedResults = {
    {false, false},
    {false, false},
    {false, false},
    {false, false},
    {false, false},
    {false, false},
    {false, false},
    {false, false},
  };

This is a 4x8 boolean array initalization made easy.

  public boolean[][] expectedResults = {
    {false, false, false, false, false, false, false, true},
    {true, false, false, false, false, false, false, true},
    {true, false, false, false, false, true, true, true},
    {false, true, true, true, true, true, true, false}
  };

answered Mar 18, 2014 at 21:03

SSpoke

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Comments

las · Accepted Answer · 2012-04-04 09:59:54Z

-2

I think you have to initialize the array like this.

boolean[][] expectedResults;
 expectedResults = new boolean[8][2];

answered Apr 4, 2012 at 9:59

las

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