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65 lines
1.6 KiB
65 lines
1.6 KiB
/*
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* Copyright (c) 2015 - present Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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package hello;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.Random;
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class Hello {
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void doesNotCauseNPE() {
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Pointers.A a = Pointers.mayReturnNull(10);
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a.method();
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}
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void mayCauseNPE() {
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Random rng = new Random();
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Pointers.A a = Pointers.mayReturnNull(rng.nextInt());
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// FIXME: should check for null before calling method()
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a.method();
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}
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void mayLeakResource() throws IOException {
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OutputStream stream = Resources.allocateResource();
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if (stream == null) {
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return;
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}
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try {
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stream.write(12);
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} finally {
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// FIXME: should close the stream
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}
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}
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/**
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* This method should be rewritten with nested try { ... } finally {
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* ... } statements, or the possible exception raised by fis.close()
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* should be swallowed.
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*/
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void twoResources() throws IOException {
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FileInputStream fis = null;
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FileOutputStream fos = null;
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try {
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fis = new FileInputStream(new File("whatever.txt"));
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fos = new FileOutputStream(new File("everwhat.txt"));
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fos.write(fis.read());
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} finally {
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if (fis != null) { fis.close(); }
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if (fos != null) { fos.close(); }
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}
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}
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}
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