langtools/test/tools/javac/lambda/ExceptionsInLambda.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8015809
 * @summary Producing individual errors for uncaught undeclared exceptions inside lambda expressions, instead of one error for whole lambda
 * @compile/fail/ref=ExceptionsInLambda.out -XDrawDiagnostics ExceptionsInLambda.java
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.InputStream;
import java.io.Reader;

public class ExceptionsInLambda {

    public static void main(Runnable p, File f) {
        main(() -> {
            StringBuilder sb = new StringBuilder();

            Reader in = new FileReader(f);
            int r;

            while ((r = in.read()) != (-1)) {
                sb.append((char) r);
            }
        }, f);

        doOpen(() -> new FileInputStream(f));
    }

    public static InputStream doOpen(Open open) {
        return open.open();
    }

    public interface Open {
        public InputStream open();
    }
}