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Java Streams CheatSheet
devv
6,690 views
Streams
Effectively final variable.
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// {
class Main {
public static void main(String[] args) {
// }
//Incorrect
for (int i = 0; i < 10; i++) {
new Thread(() -> {
System.out.println("i = " + i); // Does not c
ompile!
}).start();
}
// {
}
}
// }
Run
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// {
class Main {
public static void main(String[] args) {
// }
for (int i = 0; i < 10; i++) {
int j = i; //effectively final
new Thread(() -> System.out.println("i
= " + j)).start();
}
// {
}
}
// }
Run
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// {
class Main {
public static void main(String[] args) {
// }
//Incorrect
for (int i = 0; i < 10; i++) {
int j = i;
new Thread(() -> System.out.println("i = " + j
)).start();
j++;
}
// {
}
}
// }
Run
16
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