java create file if not exists
String yourFile = "YourFile.txt";
String yourContent = "YourContent"
File tmpDir = new File(yourFile);
boolean exists = tmpDir.exists();
if(!exists) {
FileOutputStream fos = new FileOutputStream(yourFile);
fos.write(yourContent.getBytes());
fos.flush();
fos.close();
}java find if element of list in present in another list
list1.stream()
.map(Object1::getProperty)
.anyMatch(
list2.stream()
.map(Object2::getProperty)
.collect(toSet())
::contains)
// Example with predicate
Predicate<Object> notInList1 = object -> list1.stream().noneMatch(object::equals);
List<Object> missingInList1 = list2.stream().filter(notInList1).collect(Collectors.toList());Copyright © 2021 Codeinu
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