This is not an answer, but a talking point about whether this is on, or off topic

Version 1:

What is the best practice regarding synchronization?

I have this class that works really well, but I need to make my application multi-threaded. I have read that synchronization can help. What are the best practices for making my code thread-safe?

public class Foo {

    private String foo = "Foo";

    public void setFoo(String newfoo) {
        this.foo = newfoo;
    }

    public String getFoo() {
        return foo;
    }
}

javasynchronizationbest-practice

Version 2:

What is the best practice regarding synchronization?

I have this class that works really well, but I need to make my application multi-threaded. I have read that synchronization can help, so I have synchronized the setters.

What are the best practices for making my code thread-safe?

public class Foo {

    private String foo = "Foo";

    public synchronized void setFoo(String newfoo) {
        this.foo = newfoo;
    }

    public String getFoo() {
        return foo;
    }
}

javasynchronizationbest-practice