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                ``` 類是讀取字符文件的便利類。構造時使用系統默認的字符編碼和默認字節緩沖區 ``` ### 構造方法 ``` FileReader(File?file) : 創建一個新的 FileReader ,給定要讀取的File對象。 FileReader(String?fileName) : 創建一個新的 FileReader ,給定要讀取的文件的名稱 ``` #### 讀取字符 ``` FileReader reader = new FileReader(new File("test.txt")); int b; while ((b = reader.read()) != -1){ System.out.println((char)b); } reader.close(); ``` #### 讀取字符數組 ``` FileReader reader = new FileReader(new File("test.txt")); int len; char[] b = new char[2]; while ((len = reader.read(b)) != -1){ System.out.println(b); } reader.close(); ```
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