JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: Assertion method Assert.assertNotSame() example.


Java Class: org.junit.Assert

Assert class provides a set of assertion methods useful for writing tests.

Assert.assertNotSame() methods checks that two objects do not refer to the same object. If they do refer to the same object, an AssertionError is thrown.


package com.java2novice.junit.tests;

import static org.junit.Assert.*;

import java.util.HashMap;
import java.util.Map;

import org.junit.Test;

public class MyAssertNotSameTest {

        public String getPropValue(final String key){
                Map appProps = new HashMap();
                appProps.put("key1", "value 1");
                appProps.put("key2", "value 2");
                appProps.put("key3", "value 3");
                return appProps.get(key);
        }
        
        @Test
        public void isSameReferenceTest(){
                
                MyAssertNotSameTest msnt = new MyAssertNotSameTest();
                assertNotSame(msnt.getPropValue("key1"), msnt.getPropValue("key2"));
        }
}

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Java JUnit Examples

  1. Simple JUnit test using @Test annotation.
  2. List of JUnit annotations.
  3. Assertion method Assert.assertArrayEquals() example.
  4. How to do JUnit test for comapring two list of user defined objects?
  5. Assertion method Assert.assertEquals() example.
  6. Assertion method Assert.assertFalse() example.
  7. Assertion method Assert.assertTrue() example.
  8. Assertion method Assert.assertNotNull() example.
  9. Assertion method Assert.assertNull() example.
  10. Assertion method Assert.assertNotSame() example.
  11. Assertion method Assert.assertSame() example.
Knowledge Centre
When to use LinkedList or ArrayList?
Accessing elements are faster with ArrayList, because it is index based. But accessing is difficult with LinkedList. It is slow access. This is to access any element, you need to navigate through the elements one by one. But insertion and deletion is much faster with LinkedList, because if you know the node, just change the pointers before or after nodes. Insertion and deletion is slow with ArrayList, this is because, during these operations ArrayList need to adjust the indexes according to deletion or insetion if you are performing on middle indexes. Means, an ArrayList having 10 elements, if you are inserting at index 5, then you need to shift the indexes above 5 to one more.
Famous Quotations
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
-- William Arthur Ward

About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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