import junit.framework.Assert; public class MyClassTest { @Test public void testMethod() { // Test condition String str1 = "Hello"; String str2 = "Hello"; // Assertion Assert.assertEquals(str1, str2); // Another test condition int num1 = 10; int num2 = 10; // Assertion Assert.assertTrue(num1 == num2); // Another assertion String str3 = null; // Assertion Assert.assertNull(str3); } }The above code shows some examples of how to use the junit.framework Assert package library. The first assertion checks whether two strings are equal. The second assertion checks whether two integers are equal. The third assertion checks whether a string is null. Overall, the junit.framework Assert package library is a useful tool for ensuring the correctness of Java code.