範例

public class ClassA { public void makeStream (OutputStream oStream) { try { OutputStreamWriter stream = new OutputStreamWriter(oStream); stream.write(7); //執行某種動作... stream.close(); } catch (IOException e) { //洩漏串流... } } }

解決方案

若要避免資源洩漏，請確定在每個 java.io.OutputStreamWriter 上都呼叫了 close()。 附註：這個規則適用於任何形式的 OutputStreamWriter 建構子。

public class ClassA { public void makeStream (OutputStream oStream) { OutputStreamWriter stream = null; try { stream = new OutputStreamWriter(oStream); stream.write(7); //執行某種動作... } catch (IOException e) { //執行某種動作... } finally { if (stream != null) { try { stream.close(); } catch(IOException e) { //執行某種動作... } } } } }