Java Community | Help. Code. Learn.•2mo ago

Convert boolean inside if statement

Hello, I am working on a program where I am using a particular logic for a flag, I am declaring a boolean variable, and then making an if statement that executes if the statement and then add value to an array, but I want to alternatively add values to my array. EG I have 1001 I want to add 1 in array1, 0 in both arrays, 0 in both arrays, 1 in array1. This is how I have written this in code. But the problem is that the boolean is always true, it doesn't get flase even after the if statement has executed. This is my code:

for(int i = 0; i < reversedBinaryValue.size(); i++)
        {
            boolean addToSplitOne = true;

            // since arrays are already filled with zeroes, it skips an additional step of
            // filling with zeros
            if(reversedBinaryValue.get(i) == 1)
            {
                // now working with the flag that the bit has been added to splitOne or not
                if(addToSplitOne)
                {
                    binarySplitOne[i] = reversedBinaryValue.get(i);
                    // now set the split to true so the flag is interchanged, and we can add value in split two
                    addToSplitOne = false;

                } // end of if
                else
                {
                    binarySplitTwo[i] = reversedBinaryValue.get(i);

                    // now set the split to false so that we can add value to split one
                    addedToSplitOne = true;
                } // end of else

            } // end of main if

        } // end of for

for(int i = 0; i < reversedBinaryValue.size(); i++)
        {
            boolean addToSplitOne = true;

            // since arrays are already filled with zeroes, it skips an additional step of
            // filling with zeros
            if(reversedBinaryValue.get(i) == 1)
            {
                // now working with the flag that the bit has been added to splitOne or not
                if(addToSplitOne)
                {
                    binarySplitOne[i] = reversedBinaryValue.get(i);
                    // now set the split to true so the flag is interchanged, and we can add value in split two
                    addToSplitOne = false;

                } // end of if
                else
                {
                    binarySplitTwo[i] = reversedBinaryValue.get(i);

                    // now set the split to false so that we can add value to split one
                    addedToSplitOne = true;
                } // end of else

            } // end of main if

        } // end of for

14 Replies

JavaBot•2mo ago

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MdS•2mo ago

What is your reversedBinaryValue? Would like to test it

. 𝚂𝚎𝚛𝚊𝚙𝚑𝚒𝚗𝚊 ~ 👠OP•2mo ago

Its any binary value, 0s and 1s Say, 100101 Then x will be 100001 and y will be 000100

MdS•2mo ago

Yeah, but is it in like a List or something? Since you are using .size()

. 𝚂𝚎𝚛𝚊𝚙𝚑𝚒𝚗𝚊 ~ 👠OP•2mo ago

Oh, its an arraylist

dan1st•2mo ago

You need to declare boolean addToSplitOne = true; before the beginning of the loop Otherwise you are setting it to true in each iteration

. 𝚂𝚎𝚛𝚊𝚙𝚑𝚒𝚗𝚊 ~ 👠OP•2mo ago

Before the beginning of the for loop?

dan1st•2mo ago

yes

. 𝚂𝚎𝚛𝚊𝚙𝚑𝚒𝚗𝚊 ~ 👠OP•2mo ago

Awesome, thank you. I just woke up, I will check as soon as I am on my PC! That works thank you! But is there any chance you can explain why that didnt work? I would assume that it was due to the block level but it was still a higher block than where it was changing.

dan1st•2mo ago

that here ah wrong one that loops work by executing one instruction after another so if the boolean addToSplitOne = true; is inside the loop, addToSplitOne = true will be executed in each iteration

. 𝚂𝚎𝚛𝚊𝚙𝚑𝚒𝚗𝚊 ~ 👠OP•2mo ago

Ah, that makes sense. So basically no matter what, all the control variables must always be declared outside the loops Along with all the flags

dan1st•2mo ago

depends If you want to keep the values outside of iterations, you can do that

. 𝚂𝚎𝚛𝚊𝚙𝚑𝚒𝚗𝚊 ~ 👠OP•2mo ago

That does quite make sense Thank you very much for your help, I will be closing the thread now!

JavaBot•2mo ago

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Convert boolean inside if statement