java 如何进行不区分大小写的字符串替换
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How to do a case-insensitive string replacement
提问by radha
Hi friends I'm creating an app.
I want to find a particular word in an ArrayListand I have to replace
it with another word. I used the code below. It works case sensitive,
but I'd like to get it working case insensitive.
嗨，朋友们，我正在创建一个应用程序。
我想在 an 中找到一个特定的词ArrayList，我必须
用另一个词替换它。我使用了下面的代码。它区分大小写，
但我想让它不区分大小写。
FillintheBlank.class:
public class FillintheBlank extends Activity {
static ArrayList<String> multiword=new ArrayList<String>();
static ArrayList<String> multimeaning=new ArrayList<String>();
public void setNoTitle() {
requestWindowFeature(Window.FEATURE_NO_TITLE);
}
float screenHeight,screenWidth,screendensity;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setNoTitle();
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
screenHeight = displaymetrics.heightPixels;
screenWidth = displaymetrics.widthPixels;
screendensity = displaymetrics.densityDpi;
setContentView(R.layout.fillinblanknew);
multiword.add("radha");
multiword.add("RAdHA");
multiword.add("latha");
multiword.add("mammu");
s.o.p(""+multiword);
// output:radha,RADHA,latha,mamu
multimeaning.add(multiword.getString().replace(radha,"sai"));
s.o.p(""+multimeaning);
// output: sai,RADHA,latha,mamu
}
}
For example: I need to replace 'radha' with 'sai' no matter what the case of the letters in 'radha' are.
例如：无论“radha”中的字母大小写如何，我都需要将“radha”替换为“sai”。
回答by Alex Florescu
Could use a regular expression. Just add (?i) before your string to ignore case.
可以使用正则表达式。只需在字符串前添加 (?i) 即可忽略大小写。
So for example:
例如：
multiword.getString().replaceAll ( "(?i)radha", "sai");
multiword.getString().replaceAll ( "(?i)radha", "sai");
回答by rslj
You can "(?i)" pattern in front of a string to ignore the case.
您可以在字符串前面使用“(?i)”模式来忽略大小写。
public class StringReplace {
public static void main(String[] args) {
System.out.println(replaceString("This is a FISH", "IS"));
}
public static String replaceString(String first, String second) {
return first.replaceAll("(?i)"+ second, "");
}
}
The code above will return "Th a FH".
上面的代码将返回“Th a FH”。
回答by Naor Bar
Use StringUtils by apache commons lang3 - v3.5 or later(so you don't have to worry about regular expression parsing):
通过apache commons lang3 - v3.5 或更高版本使用 StringUtils （因此您不必担心正则表达式解析）：
StringUtils.replaceIgnoreCase(text, searchString, replacement);
or:
或者：
StringUtils.replaceOnceIgnoreCase(text, searchString, replacement);
If you use maven, add this dependency (I'm using version 3.6):
如果您使用 maven，请添加此依赖项（我使用的是 3.6 版）：
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.6</version>
</dependency>
回答by Rajitha Siriwardena
You could use equalsIgnoreCase(string)method found in String class for your purpose.
您可以将equalsIgnoreCase(string)String 类中的方法用于您的目的。
