java - NetBeans 中的编译错误

Question

知道为什么 NetBeans 7 中的这段代码将 Deletion(Deletion 是客户端包中的类)标记为错误吗？

package client;

/**
 *
 * @author Arth
 */
public class Client_Main
{
     final String ORIGINAL_SEQUENCE =      "AAGCTGT"; 

         // Sample sequences demonstrating each type of DNA error
         final String MUTATION_SEQUENCE =      "AATCTGT"; 
         final String TRANSPOSITION_SEQUENCE = "AAGTCGT";
         final String INSERTION_SEQUENCE =     "AAGACTG"; 
         final String DELETION_SEQUENCE =      "AGCTGTA"; 

         final String SEQUENCE_A =      "AAAAACCCCCGGGGGTTTTT";
         final String SEQUENCE_B =      "AAAACACCCCGGGGGTTTTT";

         public void check()
         {
             Deletion d("1","2");
         }

}

行:

Deletion d("1","2");

产生错误:

';' is expected

Answer 1

此语法非法。如果您想创建一个新对象，您应该使用就地初始化:

Deletion d = new Deletion("1", "2");

或在声明后初始化:

Deletion d;
d = new Deletion("1", "2");