13- The Predicate Interface

Jul 01, 2026 03:38 · 2:02 · English · Whisper Turbo · 2 ဟောပြောသူ

ဒီ transcript နေ့စွဲကုန်ဆုံးသည်. 永久存储用升级 →

0:03

S… Speaker 1 (13- The Predicate Interface)

Another type of functional interface we have in Java is the predicate interface,

0:07

S… Speaker 1 (13- The Predicate Interface)

which is extremely useful.

0:08

S… Speaker 1 (13- The Predicate Interface)

It has tons of applications in the real world.

0:11

S… Speaker 1 (13- The Predicate Interface)

We use this interface to filter data.

0:13

S… Speaker 1 (13- The Predicate Interface)

I will show you how to do that in the next section.

0:15

S… Speaker 1 (13- The Predicate Interface)

So over here,

0:17

S… Speaker 1 (13- The Predicate Interface)

you can see that this interface has a single abstract method

0:21

S… Speaker 1 (13- The Predicate Interface)

called test.

0:22

S… Speaker 1 (13- The Predicate Interface)

We give it an object of type T and get a boolean.

0:26

S… Speaker 1 (13- The Predicate Interface)

So with this method,

0:27

S… Speaker 1 (13- The Predicate Interface)

we can check to see if this object satisfies some criteria.

0:30

S… Speaker 1 (13- The Predicate Interface)

For example,

0:31

S… Speaker 1 (13- The Predicate Interface)

we can give it a customer object and check to see if that customer has a balance.

0:35

S… Speaker 1 (13- The Predicate Interface)

This is how we use this interface for filtering data.

0:38

S… Speaker 1 (13- The Predicate Interface)

Now,

0:39

S… Speaker 1 (13- The Predicate Interface)

just like the other interfaces,

0:40

S… Speaker 1 (13- The Predicate Interface)

we have a few specializations of this interface.

0:42

S… Speaker 1 (13- The Predicate Interface)

For example,

0:43

S… Speaker 1 (13- The Predicate Interface)

we have by predicate which takes two arguments and returns a

0:48

S… Speaker 1 (13- The Predicate Interface)

boolean.

0:48

S… Speaker 2 (13- The Predicate Interface)

Take a look.

0:50

S… Speaker 1 (13- The Predicate Interface)

So, here's a test method,

0:51

S… Speaker 1 (13- The Predicate Interface)

it has two arguments of type T and U,

0:54

S… Speaker 1 (13- The Predicate Interface)

and it returns a boolean.

0:56

S… Speaker 1 (13- The Predicate Interface)

We also have primitive specializations of this interface.

0:59

S… Speaker 1 (13- The Predicate Interface)

For example,

1:00

S… Speaker 1 (13- The Predicate Interface)

we have int predicate,

1:01

S… Speaker 1 (13- The Predicate Interface)

which takes a primitive integer and returns a boolean.

1:05

S… Speaker 1 (13- The Predicate Interface)

We also have long predicate and double predicate.

1:08

S… Speaker 1 (13- The Predicate Interface)

Now let me show you how to work with the predicate interface in Java.

1:12

S… Speaker 1 (13- The Predicate Interface)

Let's say we have a string like sky,

1:15

S… Speaker 1 (13- The Predicate Interface)

and we want to check to see if this string has more than five characters.

1:19

S… Speaker 1 (13- The Predicate Interface)

So we declare a predicate of string call

1:23

S… Speaker 1 (13- The Predicate Interface)

it is longer than five and send it

1:27

S… Speaker 1 (13- The Predicate Interface)

to a lambda expression like this str goes to str

1:31

S… Speaker 1 (13- The Predicate Interface)

.length is greater than five.

1:34

S… Speaker 2 (13- The Predicate Interface)

Once again,

1:35

S… Speaker 1 (13- The Predicate Interface)

we don't have a return keyword.

1:36

S… Speaker 1 (13- The Predicate Interface)

We don't have curly braces either.

1:37

S… Speaker 1 (13- The Predicate Interface)

All we have is a boolean expression because we should return a

1:42

S… Speaker 1 (13- The Predicate Interface)

boolean value.

1:43

S… Speaker 1 (13- The Predicate Interface)

Now to use this predicate we call is

1:47

S… Speaker 1 (13- The Predicate Interface)

longer than five dot test.

1:50

S… Speaker 1 (13- The Predicate Interface)

We give it our input like sky and then get the result.

1:53

S… Speaker 2 (13- The Predicate Interface)

Next,

1:55

S… Speaker 1 (13- The Predicate Interface)

I'm going to show you how to combine predicates to build more complex predicates.

ဤ transcript ကို AI က generated ခဲ့သည် (အလိုအလျောက်စကားပြောအသိအမှတ်ပြု). အမှားအယွင်းများပါဝင်နိုင်ပါတယ် — အရေးပါသောအသုံးပြုမှုအတွက်မူရင်းအသံကိုနှိုင်းယှဉ်စစ်ဆေးပါ။ AI စည်းမျဉ်း

❤️ ချစ်ခြင်းမေတ္တာ STT.ai? သင့်မိတ်ဆွေများကိုပြောပါ!

အကျဉ်းချုပ်

ဤ transcript ၏ AI အတိုချုပ်ထုတ်လုပ်ရန် Summarize ကိုနှိပ်ပါ.

ဒီ transcript အကြောင်းကို AI ကိုမေး

ဒီ transcript အကြောင်းကိုဘာမှမေးပါ - AI သက်ဆိုင်သောအပိုင်းများကိုရှာဖွေတွေ့ရှိနှင့်အဖြေပေးလိမ့်မည်။

အခြား ဘာသာပြန်