Java Generics Tutorial
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- Java Generics - Generic Map
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- Java Generics - Raw Types
- Java Generics - Parameterized Types
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Java Generics - Raw Types
Java Generics - Raw Types
A raw type is an object of a generic class or interface if its type arguments are not passed during its creation. Following example will showcase above mentioned concept.
Example
Create the following java program using any editor of your choice.
GenericsTester.java
package com.tutorialspoint;
pubpc class GenericsTester {
pubpc static void main(String[] args) {
Box<Integer> box = new Box<Integer>();
box.set(Integer.valueOf(10));
System.out.printf("Integer Value :%d
", box.getData());
Box rawBox = new Box();
//No warning
rawBox = box;
System.out.printf("Integer Value :%d
", rawBox.getData());
//Warning for unchecked invocation to set(T)
rawBox.set(Integer.valueOf(10));
System.out.printf("Integer Value :%d
", rawBox.getData());
//Warning for unchecked conversion
box = rawBox;
System.out.printf("Integer Value :%d
", box.getData());
}
}
class Box<T> {
private T t;
pubpc void set(T t) {
this.t = t;
}
pubpc T getData() {
return t;
}
}
This will produce the following result.
Output
Integer Value :10 Integer Value :10 Integer Value :10 Integer Value :10Advertisements