import com.google.common.collect.Collections2;
import com.google.common.base.Predicate;
List<String> names = new ArrayList<>();
names.add("Alice");
names.add("Bob");
names.add("Charlie");
names.add("David");
Predicate<String> filter = new Predicate<String>() {
@Override
public boolean apply(String name) {
return name.startsWith("A");
}
};
Collection<String> filteredNames = Collections2.filter(names, filter);
import com.google.common.collect.Maps;
import com.google.common.base.Predicate;
Map<Integer, String> users = new HashMap<>();
users.put(1, "Alice");
users.put(2, "Bob");
users.put(3, "Charlie");
users.put(4, "David");
Predicate<Map.Entry<Integer, String>> filter = new Predicate<Map.Entry<Integer, String>>() {
@Override
public boolean apply(Map.Entry<Integer, String> entry) {
return entry.getValue().startsWith("A");
}
};
Map<Integer, String> filteredUsers = Maps.filterEntries(users, filter);
import com.google.common.collect.Collections2;
import com.google.common.base.Function;
List<String> names = new ArrayList<>();
names.add("Alice");
names.add("Bob");
names.add("Charlie");
names.add("David");
Function<String, String> transform = new Function<String, String>() {
@Override
public String apply(String name) {
return name.toUpperCase();
}
};
Collection<String> transformedNames = Collections2.transform(names, transform);
import com.google.common.collect.Maps;
import com.google.common.base.Function;
Map<Integer, String> users = new HashMap<>();
users.put(1, "Alice");
users.put(2, "Bob");
users.put(3, "Charlie");
users.put(4, "David");
Function<String, String> transform = new Function<String, String>() {
@Override
public String apply(String name) {
return name.toUpperCase();
}
};
Map<Integer, String> transformedUsers = Maps.transformValues(users, transform);
