我正在尋找鍵入“\”字符的正確方法，這樣我就不會收到“非法轉義字符”錯誤美好的一天，最近我開始使用 Java，參加在線基礎課程，在我的一個練習代碼中，我意識到我的鍵盤類型“\”實際上不是正確的轉義字符，因此我的代碼運行“字符串中的非法轉義字符”文字”錯誤。關于如何正確輸入或如何用正確的字符替換系統中的字符有什么建議嗎？這是帶有不正確字符的代碼：public class WellFormed {public static void main(String[] arga) { System.out.println("A well-formed Java program has"); System.out.println("a main method with \{ and \}"); System.out.println("braces."); System.out.println(); System.out.println("A System.out.println statement"); System.out.println("has \( and \) and usually a"); System.out.println("String that starts and ends"); System.out.println("with a \" character"); System.out.println("\(but we type \\" instead!"); }}
3 回答
繁星淼淼
TA貢獻1775條經驗 獲得超11個贊
它給出了非法轉義字符，因為不必轉義“(”和“{”。
System.out.println("A well-formed Java program has");
System.out.println("a main method with { and }");
System.out.println("braces.");
System.out.println();
System.out.println("A System.out.println statement");
System.out.println("has ( and ) and usually a");
System.out.println("String that starts and ends");
System.out.println("with a \" character");
System.out.println("(but we type \\\" instead!");
上面的代碼按預期編譯和工作。
可用作轉義序列的字符有：
\t Insert a tab in the text at this point.
\b Insert a backspace in the text at this point.
\n Insert a newline in the text at this point.
\r Insert a carriage return in the text at this point.
\f Insert a formfeed in the text at this point.
\' Insert a single quote character in the text at this point.
\" Insert a double quote character in the text at this point.
\\ Insert a backslash character in the text at this point.
您可以在此處找到 Java 8 的文檔：https://docs.oracle.com/javase/tutorial/java/data/characters.html
白衣染霜花
TA貢獻1796條經驗 獲得超10個贊
public class WellFormed {
public static void main(String[] arga) {
System.out.println("A well-formed Java program has");
System.out.println("a main method with \\{ and \\}");
System.out.println("braces.");
System.out.println();
System.out.println("A System.out.println statement");
System.out.println("has \\( and \\) and usually a");
System.out.println("String that starts and ends");
System.out.println("with a \" character");
System.out.println("(but we type \\\" instead!");
}
}
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