In this post, we are going to see the Java 8 Stream allMatch() method and how it works with an example. Stream allMatch() method is a short-circuiting terminal operation that will return true if all elements of the Stream satisfy the given Predicate Stream allMatch() Syntax boolean java.util.stream.Stream.allMatch(Predicate predicate) Stream.allMatch() will return true only if
Java
Type mismatch: cannot convert from nested List to List
This post is about how to deal with when we get the Type mismatch: cannot convert from List<List<Object>> to List<Object> kind of error in Java 8. For illustrating this, I have taken the Employees with matching technical skills example. SkillsList.java getSkillsList() method returns the technical skills. getEmployeeSkills() returns employee with specified technical skills. If employeeSkills
Java How to add values to List
To add values to a Java List there are numerous ways. We will discuss it one by one in detail. Insert elements using the list add method Convert Arrays to List Get input from other sources and add it to list Add values using Arrays.asList Add Elements to the List Elements are added to the
Java 8 toMap duplicate key
In List to Map conversion, we will see how to maintain unique keys. Sometimes when you use a key other than the primary key it is possible that there might be duplicate records. In those cases, you will get a Duplicate key IllegalStateException. In toMap method we can pass key and value pairs as arguments.
Convert List to Map in Java 8
Converting List to Map in Java 8 is simple compared to previous versions of Java. The conversion is demonstrated with a POJO and a main class. In the main class, the method getCarList() returns a List of Car objects and pass it as an input for the convertListToMap() method. The input can be obtained from