Java example source code file (TwrFlow.java)

This example Java source code file (TwrFlow.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

assertionerror, autocloseable, customcloseexception, ioexception, not, shouldn\'t, twrflow

The TwrFlow.java Java example source code

/*
 * @test  /nodynamiccopyright/
 * @bug 6911256 6964740 7013420
 * @author Joseph D. Darcy
 * @summary Test exception analysis of try-with-resources blocks
 * @compile/fail/ref=TwrFlow.out -XDrawDiagnostics TwrFlow.java
 */

import java.io.IOException;
public class TwrFlow implements AutoCloseable {
    public static void main(String... args) {
        try(TwrFlow twrFlow = new TwrFlow()) {
            System.out.println(twrFlow.toString());
        } catch (IOException ioe) { // Not reachable
            throw new AssertionError("Shouldn't reach here", ioe);
        }
        // CustomCloseException should be caught or added to throws clause
    }

    /*
     * A close method, but the class is <em>not Closeable or
     * AutoCloseable.
     */
    public void close() throws CustomCloseException {
        throw new CustomCloseException();
    }
}

class CustomCloseException extends Exception {}