JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: Assertion method Assert.assertNotNull() example.


Java Class: org.junit.Assert

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

Assert.assertNotNull() methods checks that the object is null or not. If it is null then it throws an AssertionError.


package com.java2novice.junit.tests;

import java.util.HashMap;
import java.util.Map;
import static org.junit.Assert.*;
import org.junit.Test;

public class MyAssertNotNullTest {

	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 test(){
		MyAssertNotNullTest msnt = new MyAssertNotNullTest();
		assertNotNull(msnt.getPropValue("key1"));
	}
}

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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.
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What is adapter class?
An adapter class provides the default implementation of all methods in an event listener interface. Adapter classes are very useful when you want to process only few of the events that are handled by a particular event listener interface. You can define a new class by extending one of the adapter classes and implement only those events relevant to you.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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