How do you implement a re-try-catch?

You need to enclose your try-catch inside a while loop like this: -

int count = 0;int maxTries = 3;while(true) {    try {        // Some Code        // break out of loop, or return, on success    } catch (SomeException e) {        // handle exception        if (++count == maxTries) throw e;    }}

I have taken count and maxTries to avoid running into an infinite loop, in case the exception keeps on occurring in your try block.

Obligatory "enterprisy" solution:

public abstract class Operation {    abstract public void doIt();    public void handleException(Exception cause) {        //default impl: do nothing, log the exception, etc.    }}public class OperationHelper {    public static void doWithRetry(int maxAttempts, Operation operation) {        for (int count = 0; count < maxAttempts; count++) {            try {                operation.doIt();                count = maxAttempts; //don't retry            } catch (Exception e) {                operation.handleException(e);            }        }    }}

And to call:

OperationHelper.doWithRetry(5, new Operation() {    @Override public void doIt() {        //do some stuff    }    @Override public void handleException(Exception cause) {        //recover from the Exception    }});

As usual, the best design depends on the particular circumstances. Usually though, I write something like:

for (int retries = 0;; retries++) {    try {        return doSomething();    } catch (SomeException e) {        if (retries < 6) {            continue;        } else {            throw e;        }    }}