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53 lines
1.2 KiB
53 lines
1.2 KiB
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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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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import java.util.ArrayList;
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class ArrayListTest {
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void alloc_is_negative_bad() {
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// initial capacity cannot be negative
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ArrayList<Integer> x = new ArrayList<Integer>(-1);
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}
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void alloc_is_ok() {
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// initial capacity cannot be negative
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ArrayList<Integer> x = new ArrayList<Integer>(9);
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}
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void add_in_loop_ok() {
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ArrayList<Integer> a = new ArrayList<>();
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for (int i = 0; i < 5; i++) {
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a.add(0);
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}
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int j = a.get(3);
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}
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void add_in_loop_bad() {
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ArrayList<Integer> a = new ArrayList<>();
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for (int i = 0; i < 5; i++) {
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a.add(0);
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}
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int j = a.get(6);
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}
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void add_in_loop_by_param_ok(ArrayList<Integer> b) {
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ArrayList<Integer> a = new ArrayList<>();
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for (int i = 0; i < b.size(); i++) {
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a.add(0);
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}
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int j = a.get(b.size() - 1);
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}
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void add_in_loop_by_param_bad(ArrayList<Integer> b) {
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ArrayList<Integer> a = new ArrayList<>();
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for (int i = 0; i < b.size(); i++) {
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a.add(0);
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}
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int j = a.get(b.size() + 1);
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}
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}
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