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61 lines
1.2 KiB
61 lines
1.2 KiB
/*
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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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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// NPE
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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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// Resource leak
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}
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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) {
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fis.close();
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} // Resource leak
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if (fos != null) {
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fos.close();
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}
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}
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}
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}
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