Question

How to create a method that return generic type in Java

Answer 1

public class MyClass {
    public static <T> T getValue(T[] array, int index) {
        return array[index];
    }
        
    public static void main(String args[]) {
        
        String[] array = {"java", "c", "c++", "c#"};
        
        String value = MyClass.<String>getValue(array, 1);
        
        System.out.println(value);
    }
}
   
   
   
   
/*
run:
  
c
  
*/

 

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Answer 2

public class MyClass {
    public static <T> T getValue(T[] array, int index) {
        return array[index];
    }
        
    public static void main(String args[]) {
        
        Integer[] array = {2, 5, 8, 9, 0, 3};
        
        Integer value = MyClass.<Integer>getValue(array, 2);
        
        System.out.println(value);
    }
}
   
   
   
   
/*
run:
  
8
  
*/

 

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Answer 3

public class MyClass {
    public static <T> void getValues(T[] array) {
        for (T element : array) {
            System.out.println(element);
        }
    }
         
    public static void main(String args[]) {
         
        Double[] array = {2.3, 5.28, 8.19, 9.9, 0.03, 3.14};
         
        MyClass.<Double>getValues(array);
    }
}
    
    
    
    
/*
run:
   
2.3
5.28
8.19
9.9
0.03
   
*/

 

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Answer 4

public class MyClass {
    public static <T> void getValues(T[] array) {
        for (T element : array) {
            System.out.println(element);
        }
    }
         
    public static void main(String args[]) {
         
        Character[] array = { 'a', 'b', 'c', 'd', 'e', 'f', 'g' };
        
        getValues(array);
    }
}
    
    
    
    
/*
run:
   
a
b
c
d
e
f
g
   
*/

 

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