JAVA泛型应用

Spring Framework应用

• org.springframework.core.env.JOptCommandLinePropertySource

@Override
public List<String> getOptionValues(String name) {
	List<?> argValues = this.source.valuesOf(name);
	List<String> stringArgValues = new ArrayList<String>();
	for (Object argValue : argValues) {
		stringArgValues.add(argValue.toString());
	}
	if (stringArgValues.isEmpty()) {
	    // 泛型应用
		return (this.source.has(name) ? Collections.<String>emptyList() : null);
	}
	return Collections.unmodifiableList(stringArgValues);
}