如何用Java中的另一个单词替换字符串中所有出现的单词？
String类的replaceAll()方法接受两个字符串，一个代表正则表达式以查找字符串，另一个代表替换字符串。
并且，用给定的String替换所有匹配的序列。因此，用String中的另一个单词替换特定单词-
获取所需的字符串。
通过传递对表示要替换的单词的正则表达式（在单词边界“\b”内）和替换字符串作为参数，对获得的字符串调用全部替换方法。
检索结果并打印。
示例
import java.io.File;
import java.io.IOException;
import java.util.Scanner;
public class ReplacingWords {
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(new File("D://sample.txt"));
String input;
StringBuffer sb = new StringBuffer();
while (sc.hasNextLine()) {
input = sc.nextLine();
sb.append("\n"+input);
}
String contents = sb.toString();
System.out.println("Contents of the string: "+contents);
contents = contents.replaceAll("\\bnhooo.com\\b", "TP");
System.out.println("Contents of the string after replacement: ");
System.out.println(contents);
}
}输出结果
Contents of the string: nhooo.com originated from the idea that there exists a class of readers who respond better to on-line content and prefer to learn new skills at their own pace from the comforts of their drawing rooms. At nhooo.com we provide high quality learning-aids for free of cost. nhooo.com recently developed an app to help students from 6th to 12th. Contents of the string after replacement: TP originated from the idea that there exists a class of readers who respond better to on-line content and prefer to learn new skills at their own pace from the comforts of their drawing rooms. At TP we provide high quality learning-aids for free of cost. TP recently developed an app to help students from 6th to 12th.
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