Convert Array of Strings to Boolean List in Java

Question

How can I convert Array of Strings into Boolean ArrayList in Java?

For ex: I have String Array like this:

String[] strs= {"true","false","false","true",..etc};

Now, I want all of the above values into a Boolean ArrayList.

List<Boolean> bools=[true, false, false, true, ..etc]

I can do something like this below, but I want this task to be accomplished in one single line of code.

String[] strs={"true","false","false","true",..etc};
List<Boolean> bools=new ArrayList<Boolean>();
for(String x:strs) 
    bools.add(Boolean.parseBoolean(x));

Why do you want to do this in a single line of code? And what "single line of code" mean? `for(String x:strs) bools.add(Boolean.parseBoolean(x));` is a single line.... — Tunaki, Oct 05 '16 at 12:12
If you are using java-8 use streams to achieve it..but it also does the same ,but looks as single line — Prasanna Kumar H A, Oct 05 '16 at 12:13
yes, without any loops. Something like, `Arrays.asList(strs);` for String array to ArrayList of Strings. — Srikanth Nakka, Oct 05 '16 at 12:14

score 7 · Accepted Answer · edited Jun 20 '20 at 09:12

7

You can use streams with java8

Example:

final String[] stringArray = { "true", "false", "true", etc };
final Boolean[] booleanArray = Arrays.stream(stringArray).map(Boolean::parseBoolean).toArray(Boolean[]::new);
System.out.println(Arrays.toString(booleanArray));

edited Jun 20 '20 at 09:12

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answered Oct 05 '16 at 12:15

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Is it not possible in Java 7? For ex, BooleanUtils of Apache Commons.? – Srikanth Nakka Oct 05 '16 at 13:25

Convert Array of Strings to Boolean List in Java

1 Answers1

Example: