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Anushkaa-KashyapAnushkaa-Kashyap
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banking application
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‎banking application/bankmanagemment.java

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package banking;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.SQLIntegrityConstraintViolationException;
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import java.sql.Statement;
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public class bankManagement { // these class provides all
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// bank method
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private static final int NULL = 0;
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static Connection con = connection.getConnection();
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static String sql = "";
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public static boolean
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createAccount(String name,
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int passCode) // create account function
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{
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try {
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// validation
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if (name == "" || passCode == NULL) {
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System.out.println("All Field Required!");
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return false;
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}
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// query
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Statement st = con.createStatement();
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sql = "INSERT INTO customer(cname,balance,pass_code) values('"
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+ name + "',1000," + passCode + ")";
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// Execution
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if (st.executeUpdate(sql) == 1) {
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System.out.println(name
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+ ", Now You Login!");
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return true;
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}
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// return
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}
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catch (SQLIntegrityConstraintViolationException e) {
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System.out.println("Username Not Available!");
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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return false;
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}
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public static boolean
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loginAccount(String name, int passCode) // login method
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{
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try {
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// validation
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if (name == "" || passCode == NULL) {
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System.out.println("All Field Required!");
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return false;
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}
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// query
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sql = "select * from customer where cname='"
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+ name + "' and pass_code=" + passCode;
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PreparedStatement st
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= con.prepareStatement(sql);
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ResultSet rs = st.executeQuery();
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// Execution
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BufferedReader sc = new BufferedReader(
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new InputStreamReader(System.in));
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if (rs.next()) {
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// after login menu driven interface method
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int ch = 5;
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int amt = 0;
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int senderAc = rs.getInt("ac_no");
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;
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int receiveAc;
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while (true) {
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try {
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System.out.println(
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"Hallo, "
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+ rs.getString("cname"));
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System.out.println(
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"1)Transfer Money");
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System.out.println("2)View Balance");
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System.out.println("5)LogOut");
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System.out.print("Enter Choice:");
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ch = Integer.parseInt(
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sc.readLine());
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if (ch == 1) {
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System.out.print(
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"Enter Receiver A/c No:");
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receiveAc = Integer.parseInt(
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sc.readLine());
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System.out.print(
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"Enter Amount:");
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amt = Integer.parseInt(
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sc.readLine());
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if (bankManagement
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.transferMoney(
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senderAc, receiveAc,
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amt)) {
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System.out.println(
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"MSG : Money Sent Successfully!\n");
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}
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else {
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System.out.println(
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"ERR : Failed!\n");
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}
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}
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else if (ch == 2) {
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bankManagement.getBalance(
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senderAc);
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}
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else if (ch == 5) {
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break;
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}
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else {
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System.out.println(
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"Err : Enter Valid input!\n");
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}
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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else {
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return false;
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}
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// return
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return true;
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}
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catch (SQLIntegrityConstraintViolationException e) {
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System.out.println("Username Not Available!");
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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return false;
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}
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public static void
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getBalance(int acNo) // fetch balance method
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{
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try {
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// query
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sql = "select * from customer where ac_no="
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+ acNo;
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PreparedStatement st
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= con.prepareStatement(sql);
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ResultSet rs = st.executeQuery(sql);
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System.out.println(
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"-----------------------------------------------------------");
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System.out.printf("%12s %10s %10s\n",
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"Account No", "Name",
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"Balance");
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// Execution
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while (rs.next()) {
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System.out.printf("%12d %10s %10d.00\n",
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rs.getInt("ac_no"),
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rs.getString("cname"),
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rs.getInt("balance"));
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}
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System.out.println(
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"-----------------------------------------------------------\n");
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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}
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public static boolean transferMoney(int sender_ac,
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int reveiver_ac,
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int amount)
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throws SQLException // transfer money method
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{
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// validation
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if (reveiver_ac == NULL || amount == NULL) {
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System.out.println("All Field Required!");
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return false;
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}
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try {
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con.setAutoCommit(false);
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sql = "select * from customer where ac_no="
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+ sender_ac;
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PreparedStatement ps
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= con.prepareStatement(sql);
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ResultSet rs = ps.executeQuery();
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if (rs.next()) {
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if (rs.getInt("balance") < amount) {
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System.out.println(
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"Insufficient Balance!");
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return false;
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}
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}
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Statement st = con.createStatement();
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// debit
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con.setSavepoint();
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sql = "update customer set balance=balance-"
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+ amount + " where ac_no=" + sender_ac;
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if (st.executeUpdate(sql) == 1) {
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System.out.println("Amount Debited!");
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}
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// credit
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sql = "update customer set balance=balance+"
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+ amount + " where ac_no=" + reveiver_ac;
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st.executeUpdate(sql);
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con.commit();
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return true;
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}
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catch (Exception e) {
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e.printStackTrace();
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con.rollback();
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}
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// return
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return false;
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}
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}

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