光子CI之旅

UnmodifiableArray{VALUES0=RED, VALUES1=YELLO}

public class UnmodifiableArrayList {
      // 消除安全漏洞
     private static final String[] PRIVATE_VALUES = { "RED", "GREEN" };
     public static final List<String> PVALUES = Collections.unmodifiableList(Arrays.asList(PRIVATE_VALUES));
     public static void main(String[] args) {
         UnmodifiableArrayList UF = new UnmodifiableArrayList();
         UF.PVALUES.add(1, "YELLO"); //會拋出UnsupportedOperationException異常
         System.out.println(UF);
     }
     //使用Guava
     @Override
     public String toString() {
         return Objects.toStringHelper(this)
                         .add("PVALUES0", UnmodifiableArrayList.PVALUES.get(0))
                         .add("PVALUES1", UnmodifiableArrayList.PVALUES.get(1))
                         .toString();
     }
 }

ImmutableList mmutableList = ImmutableList.of(PRIVATE_VALUES);