Write a java program that connects to oracle database, queries the inbuilt table “emp” and displays the first two columns (empno using column index and ename using column name ) of all the rows.

Inserting a record ABC International School wants to computerize students details. The school maintains a database of students in Oracle. The student table contains information related to students and is shown in the following student table structure. Column Name Type Constraint Rollno Number ...

Write a program in Java that enters student details (Roll No, Name etc) and retrieves information. Use oracle as a database and write the application in JDBC.

Design a simple calculator (called SwingCalculator). Hints: ·        Set the ContentPane to BorderLayout. Add a JTextField (tfDisplay) to the NORHT. Add a JPanel (panelButtons) to the CENTER. Set the JPanel to GridLayout of 4×4, and add the 16 buttons. ·        Operator buttons “+”, “-“, “*”, “/”, “%” and “=”.