Refactoring multiple boolean conditions? I have a Predicate which takes employee object.
Predicate&lt;Employee&gt; getPredicate() {
    return emp -&gt; filter(emp);
}

Now the filter method is very complex, it calls four other methods which returns true/false if all the conditions are true, the predicate will return true.
private boolean filter(Employee employee) {
    String employeeJSONString = employeeToString(employee);
    return filterBasedOnConsistAge(employeeJSONString) &amp;&amp; 
           filterBasedOnConsistGender(employeeJSONString) &amp;&amp;
           filterBasedOnConsistNationality(employeeJSONString) &amp;&amp;
           filterBasedOnConsistHandicap(employeeJSONString);
}

private String employeeToString(Employee employee) {
    // converts domainObject to a formatted string, it's a business requirement
}

There are five-line methods, that are linked using logical AND. But the problem here is, the chaining is looking clean. is there a way to improve this logic?
What especially jumps at me is, that you take your real data object (the Employee), convert it to a string representation and do your checks on the string.

Why? Can't you check your data object?

Apart from that, I don't see a problem with 5 and-conditions. This is clearer to read than some clever stream-through-predicates-and-reduce code. Clear. Simple. Leave it like that.

What I'd recommend is rethinking your naming:


getPredicate(): yes, it returns a predicate, we see that from the method signature. But what does this predicate test?
filter(): does some filtering, but according to which criteria?


(Sorry to pepijno, I typed this without seeing your answer... no offense meant ;-))