Niko Question

[Simran Dass]

class Test2<String> {
String my = "Hello!";
}

Cannot understand why above code gives Compiler Error -

niko1.java:17: incompatible types
found : java.lang.String
required: String
String my = "Hello!";

[Ankit Garg]

class Test2<String>

In that declaration, <String> doesn't mean java.lang.String, you are creating a new type, just like <T>, so in the class, when you use String, it will not represent java.lang.String. The code actually can be written like this too

class Test2<T> {
    T my = "Hello!";  //error
}

[Sumukh Deshpande]

Ankit then what should be the correct syntax to achieve what Simran Dass is trying to do?

[Ankit Garg]

Sumukh Deshpande wrote:Ankit then what should be the correct syntax to achieve what Simran Dass is trying to do?

class Test2<String> {
java.lang.String my = "Hello!";
} 

[Rohan Kayan]

  
# class Test2<String> {  
# java.lang.String my = "Hello!";  
# } 
  

If I am not wrong. the generic type "String" is creating confusion , we generally use <T> or some other character for generic types , in above code we are using "String" to represent generic type.

[Vivek K Singh]

in the modified code sample by Ankit:

class Test2<String> {   
		java.lang.String my = "Hello!";
	}

The generic type String will never be used as the type parameter String is hiding the type String.

The code sample compiles as the we gave the full reference to java.lang.String but in your code you will never be able to use the generic type "String".