How to use Oracle's transaction in java

How to use transactions
in java programs to ensure data consistency when operating databases in java, such as transfer operations

1) Deduct 10$ from one account
2) Add 10$ to another account

How to use transactions?

 

package Test;

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

public class TestTrans {

	public static void main(String[] args) {
		// transaction case
		Connection ct = null;
		try {
			//load driver
			Class.forName("oracle.jdbc.driver.OracleDriver");
			
			// get the connection
			ct = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl","scott","tiger");
			
			// join transaction
			//The system defaults to automatic commit, so to join transaction processing, you need to set the default commit to false
			ct.setAutoCommit(false);//The setting cannot be submitted by default

			Statement sm = ct.createStatement();
			
			//from scott's sal-100
			sm.executeUpdate("update kkkk set sal=sal-100 where ename='SCOTT'");
			
//			int i=7/0;
			
			//sal+100 from SMITH
			sm.executeUpdate("update kkkk set sal=sal+100 where ename='SMITH'");
			
			// commit the transaction
			ct.commit();
			
			//close the resource
			sm.close();
			ct.close();
			
		} catch (Exception e) {
			
			//If an exception occurs, roll back
			try {
				ct.rollback();//rollback itself will be abnormal
			} catch (Exception ex) {
				ex.printStackTrace();
			}

			e.printStackTrace ();
		}
	}
	
}