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fix: Use .equals() to compare two strings in Java (#961)
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1 changed files with 3 additions and 3 deletions
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@ -63,15 +63,15 @@ class ArrayBinaryTree {
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if (val(i) == null)
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if (val(i) == null)
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return;
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return;
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// 前序遍历
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// 前序遍历
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if (order == "pre")
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if ("pre".equals(order))
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res.add(val(i));
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res.add(val(i));
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dfs(left(i), order, res);
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dfs(left(i), order, res);
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// 中序遍历
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// 中序遍历
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if (order == "in")
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if ("in".equals(order))
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res.add(val(i));
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res.add(val(i));
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dfs(right(i), order, res);
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dfs(right(i), order, res);
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// 后序遍历
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// 后序遍历
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if (order == "post")
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if ("post".equals(order))
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res.add(val(i));
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res.add(val(i));
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}
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}
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