How to use

strong

method

in

com.google.common.collect.Interners$InternerBuilder

/**
 * Returns a new thread-safe interner which retains a strong reference to each instance it has
 * interned, thus preventing these instances from being garbage-collected. If this retention is
 * acceptable, this implementation may perform better than {@link #newWeakInterner}.
 */
public static <E> Interner<E> newStrongInterner() {
 return newBuilder().strong().build();
}

/**
 * Returns a new thread-safe interner which retains a strong reference to each instance it has
 * interned, thus preventing these instances from being garbage-collected. If this retention is
 * acceptable, this implementation may perform better than {@link #newWeakInterner}.
 */
public static <E> Interner<E> newStrongInterner() {
 return newBuilder().strong().build();
}

public void testStrong_builder() {
 int concurrencyLevel = 42;
 Interner<Object> interner = Interners.newBuilder()
   .strong()
   .concurrencyLevel(concurrencyLevel)
   .build();
 InternerImpl<Object> internerImpl = (InternerImpl<Object>) interner;
 assertEquals(Strength.STRONG, internerImpl.map.keyStrength());
}

/**
 * Returns a new thread-safe interner which retains a strong reference to each instance it has
 * interned, thus preventing these instances from being garbage-collected. If this retention is
 * acceptable, this implementation may perform better than {@link #newWeakInterner}.
 */
public static <E> Interner<E> newStrongInterner() {
 return newBuilder().strong().build();
}

/**
 * Returns a new thread-safe interner which retains a strong reference to each instance it has
 * interned, thus preventing these instances from being garbage-collected. If this retention is
 * acceptable, this implementation may perform better than {@link #newWeakInterner}.
 */
public static <E> Interner<E> newStrongInterner() {
 return newBuilder().strong().build();
}

public void testStrong_builder() {
 int concurrencyLevel = 42;
 Interner<Object> interner =
   Interners.newBuilder().strong().concurrencyLevel(concurrencyLevel).build();
 InternerImpl<Object> internerImpl = (InternerImpl<Object>) interner;
 assertEquals(Strength.STRONG, internerImpl.map.keyStrength());
}

/**
 * Returns a new thread-safe interner which retains a strong reference to each instance it has
 * interned, thus preventing these instances from being garbage-collected. If this retention is
 * acceptable, this implementation may perform better than {@link #newWeakInterner}.
 */
public static <E> Interner<E> newStrongInterner() {
 return newBuilder().strong().build();
}