{"id":6416,"date":"2015-05-08T23:23:47","date_gmt":"2015-05-08T15:23:47","guid":{"rendered":"http:\/\/onthe8spot.com\/?p=6416"},"modified":"2015-05-08T23:23:47","modified_gmt":"2015-05-08T15:23:47","slug":"how-to-use-predicate-in-java-8-howtodoinjava","status":"publish","type":"post","link":"http:\/\/onthe8spot.com\/index.php\/2015\/05\/08\/how-to-use-predicate-in-java-8-howtodoinjava\/","title":{"rendered":"How to use Predicate in java 8 – HowToDoInJava"},"content":{"rendered":"

In mathematics, a predicate is commonly understood to be a Boolean-valued function P: X? {true, false}, called the predicate on X. Informally, a predicate is a statement that may be true or false depending on the values of its variables. It can be thought of as an operator or function that returns a value that is either true or false. In java 8, Predicate a functional interface and can therefore be used as the assignment target for a lambda expression or method reference. So, where you think, you can use these true\/false returning functions in day to day programming? I will say you can use them anywhere where you need to evaluate a condition on group\/collection of similar objects such that evaluation can result either in true or false e.g. 1) Find all children borned after a particular date 2) Pizzas ordered a specific time 3) Employees greater than certain age and so on.. So Predicate seems to be interesting thing. Let\u2019s go deeper. As I said, Predicate is functional interface. It mean we can pass lambda expressions wherever predicate is expected. For example one such method is filter() method from Stream interface.<\/p><\/blockquote>\n

Source: How to use Predicate in java 8 – HowToDoInJava<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

In mathematics, a predicate is commonly understood to be a Boolean-valued function P: X? {true, false}, called the predicate on X. Informally, a predicate is a statement that may be true or false depending on the values of its variables. It can be thought of as an operator or function that returns a value that … <\/p>\n

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