/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
Optional<Integer> a = Optional.of(1);
Optional<Integer> b = a
.filter(aa -> aa == 2)
.or(() -> Optional.of(3));
}
}
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