CODEWITHSUNDEEP
java
javaLearner101
javaLearner101

Reputation: 51

The type of the expression must be an array type but it resolved to String1

Hello I am very new to java and I want to use a constructor, pass it with a parameter from another class.

But eclipse is giving me an error "The type of the expression must be an array type but it resolved to String".

String sType = type[0]; 
String mName = type[1];

for the above

please could someone help me with the below and point out my mistakes?

public class M {
    String [] type= new String [2];

public M (String type) {            
            this.Type = Type.split("\\.");
            String sType = type[0]; 
            String mName = type[1];
            System.out.println(sType);
  }
}

Upvotes: 1

Views: 735

Answers (4)

user4668606
user4668606

Reputation:

This is plain lack of attention. The code contains tons of different variables called "Type" with lower and uppercase letters or letters added, etc. type is the argument passed to the constructor, which is a String and thus the error occurs. This code has a poor style. You should use more distinct names instead of different versions of "type".

Upvotes: 0

Jon Skeet
Jon Skeet

Reputation: 1501656

Well, there are two problems here. First, you've got:

this.Type = Type.split("\\.");

... which uses Type instead of type.

Next, you're using type[0] which is referring to the parameter called type, not the field.

You could fix it to:

public M(String type) {
    this.type = type.split("\\.");
    String sType = this.type[0]; 
    String mName = this.type[1];
    System.out.println(sType);
}

... but I'd seriously consider changing the name of the fields to types instead of type - or possibly a custom class, if this is an array that is always expected to have two elements with a specific meaning.

(I'm also hoping that your class isn't really called M...)

Upvotes: 2

Enerccio
Enerccio

Reputation: 251

you have 

this.Type = Type.split("\\.");

but there is no field name Type.

Upvotes: 0

bryce
bryce

Reputation: 852

Don't you have a problem with the capital letter T for Type. The attribute is type and not Type

And you miss the keyword this.

String mName = this.type[0]

Upvotes: 1

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