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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; public class GenericsTester { public static void main(String[] args) { Box<Integer> box = new Box<Integer>(); box.set(Integer.valueOf(10)); System.out.printf("Integer Value :%dn", box.getData()); Box rawBox = new Box(); //No warning rawBox = box; System.out.printf("Integer Value :%dn", rawBox.getData()); //Warning for unchecked invocation to set(T) rawBox.set(Integer.valueOf(10)); System.out.printf("Integer Value :%dn", rawBox.getData()); //Warning for unchecked conversion box = rawBox; System.out.printf("Integer Value :%dn", box.getData()); } } class Box<T> { private T t; public void set(T t) { this.t = t; } public T getData() { return t; } }
This will produce the following result.
Output
Integer Value :10 Integer Value :10 Integer Value :10 Integer Value :10
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