how to execute multiple different queries in one execute?

I want to execute the multiple queries or job in one execute. Something like this eg:

Code :

---

String query="select * from tab1;insert into tab1 values(...);update tab1..;delete from tab1...;"  
Statement st = con1.createStatement();  
ResultSet rs = st.executeQuery(query);

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Or multiple select queries.Queries will be dynamic.

But I am not able to do this.What is the way to run multiple queries separated by semi colon.

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