Answers:
尝试以下操作: https : //docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html#replace%28java.lang.CharSequence,%20java.lang.CharSequence%29
String a = "HelloBrother How are you!";
String r = a.replace("HelloBrother","Brother");
System.out.println(r);
这将打印出“兄弟你好!”
有可能不使用额外的变量
String s = "HelloSuresh";
s = s.replace("Hello","");
System.out.println(s);
可以通过以下方法完成将一个字符串替换为另一个字符串的操作
方法1: 使用字符串replaceAll
String myInput = "HelloBrother";
String myOutput = myInput.replaceAll("HelloBrother", "Brother"); // Replace hellobrother with brother
---OR---
String myOutput = myInput.replaceAll("Hello", ""); // Replace hello with empty
System.out.println("My Output is : " +myOutput);
方法2:使用Pattern.compile
import java.util.regex.Pattern;
String myInput = "JAVAISBEST";
String myOutputWithRegEX = Pattern.compile("JAVAISBEST").matcher(myInput).replaceAll("BEST");
---OR -----
String myOutputWithRegEX = Pattern.compile("JAVAIS").matcher(myInput).replaceAll("");
System.out.println("My Output is : " +myOutputWithRegEX);
方法3:使用Apache Commons
以下链接中定义的方法:
http://commons.apache.org/proper/commons-lang/javadocs/api-z.1/org/apache/commons/lang3/StringUtils.html#replace(java.lang.String, java.lang.String, java.lang.String)
另一个建议,假设您在字符串中有两个相同的单词
String s1 = "who is my brother, who is your brother"; // I don't mind the meaning of the sentence.
replace函数会将第一个参数中给定的每个字符串更改为第二个参数
System.out.println(s1.replace("brother", "sister")); // who is my sister, who is your sister
您也可以使用replaceAll方法获得相同的结果
System.out.println(s1.replace("brother", "sister")); // who is my sister, who is your sister
如果您只想更改第一个位于较早位置的字符串,
System.out.println(s1.replaceFirst("brother", "sister")); // whos is my sister, who is your brother.