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javaoptimizationlambdajava-streamrefactoring

How to optymalize iteration by list and calling method

I would like to optymalize my process of iteration by list and filltering it. For example: I have a short list of some similar objects where the difference will be one field:

List<ObjTest> objects = getListOfObjects();

Next, I would like to check if list is not empty and iter by each object, compare fields with input andi if fields will match I would like to call methodA. Otherwise, when fields of objects not match I would like to call after iteration methodB.

Something like:

for (ObjTest objTest : objects) {
    if (objTest.getField().equals(input.getField()) {
        return methodA(input);
    }
}
return methodB(input)

Is it possible to do by objects.stream?

Solution

  • You can use anyMatch():

    if (objects.stream().anyMatch(o -> o.getField().equals(input.getField()))) {
    return methodA(input);
} else {
    return methodB(input);
}