I am trying to debug a simple Java application which is using Lambda Expression. I am not able to debug Lambda Expression using normal Eclipse debugger.
We can use different IDE's like Netbeans, IntelliJ, and Eclipse to debug the lambda expressions in Java. It is always possible to create multi-line lambda expressions and use print statements to display the values of a variable. The debugger can also provide additional information about the state of a java program.
Q 6 - Which of the following is correct about Java 8 lambda expression? A - Using lambda expression, you can refer to final variable or effectively final variable (which is assigned only once).
It's late answer but hope it is useful for someone. I use this https://stackoverflow.com/a/24542150/10605477 but sometimes when code is a bit messy or I can't get data I just break the code and insert peek.
protected Optional<Name> get(String username) {
return profileDao.getProfiles()
.stream()
.filter(profile ->
profile.getUserName().equals(username))
.peek(data -> System.out.println(data))
.findFirst();
}
You can transform the expressions into statements.
List<String> list = new ArrayList<>();
// expression
boolean allMatch1 = list.stream().allMatch(s -> s.contains("Hello"));
// statement
boolean allMatch2 = list.stream().allMatch(s -> {
return s.contains("Hello");
});
You can now set the break-point on the return s.contains("Hello");
line
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