Java面試題|String對象中的replace和replaceAll的區別?

參考答案:

replace方法：支持字符和字符串的替換。

public String replace(char oldChar, char newChar)

public String replace(CharSequence target, CharSequence replacement)

replaceAll方法：基於正則表達式的字符串替換。

public String replaceAll(String regex, String replacement)

測試代碼：

String str = "Hello Java. Java is a language.";
System.out.println(str.replace("Java.", "c++"));//列印 Hello c++ Java is a language.
System.out.println(str.replaceAll("Java.", "c++"));//列印 Hello c++ c++is a language.

列印結果：

Hello c++ Java is a language.
Hello c++ c++is a language.