Yusuf ŞAHİN

Kategori: Java

  • Java Programcılarının yaptığı 10 temel hata

    Java ile çalışırken yapılan 10 temel hatayı çözümü ile anlatmış bir kaynak.

    Aşağıdaki linkten ulaşabilirsiniz.

     http://www.javacoffeebreak.com/articles/toptenerrors.html


    Source: rss

  • JUnit – Basit bir örnek

    http://www.ic.sunysb.edu/stu/yosong/cse219/junit.html

    import org.junit.*;

    public class ExampleTest {

        /**
         * methods annotated with @BeforeClass are
         * called once before the test methods run
         */
        @BeforeClass
        public static void setUpBeforeClass() {
            ;
        }
       
        /**
         * methods annotated with @AfterClass are
         * called once after all test methods run
         */
        @AfterClass
        public static void tearDownAfterClass() {
            ;
        }
       
        /**
         * methods annotated with @Before are
         * called before every test case method
         */
        @Before
        public void setUp() {
    ;
        }

        /**
         * methods annotated with @After are
         * called after every test case method
         */
        @After
        public void tearDown() {
    ;
        }
       
        /**
         * methods annotated with @Test are
         * your actual Unit Test methods
         * test using:
         *    Assert.assertEquals
         *    Assert.assertTrue
         *    Assert.assertFalse
         *    Assert.assertNotNull
         *    Assert.assertNull
         *    etc.
         */
        @Test
        public void firstTest() {
    ;
        }
       
        @Test
        public void secondTest() {
    ;
        }

        @Test(expected=Exception.class)
        public void checkExceptionTest() {
    ;
        }
    }


    Source: rss

  • JDBC ile MySQL bağlantısı

    package net.yusufsahin.pk1;

    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.PreparedStatement;
    import java.sql.ResultSet;


    public class MainProgram {
    public static void main(String[] args) {

                       try {
    Class.forName(“com.mysql.jdbc.Driver”);
    Connection con = DriverManager.getConnection(“jdbc:mysql://localhost/sakila”, “yourUserName”, “yourPassword”);
    PreparedStatement ps = con.prepareStatement(“select customer_id,first_name,last_name from customer”);
    ResultSet rs = ps.executeQuery();

                                        while(rs.next()){

                                       System.out.println(rs.getInt(“customer_id”)
    +“-“+rs.getString(“first_name”)
    +” “+rs.getString(“last_name”));
    }

                       } catch (Exception {
    e.printStackTrace();
    }
    }
    }

    Aşağıdaki gibi bir çıktı elde etmelisiniz.


    Source: rss

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