[英]How to do a case-insensitive string replacement
Hi friends I'm creating an app. 嗨朋友我正在创建一个应用程序。
I want to find a particular word in an ArrayList
and I have to replace 我想在
ArrayList
找到一个特定的单词,我必须替换
it with another word. 用另一个词来说。 I used the code below.
我使用下面的代码。 It works case sensitive,
它区分大小写,
but I'd like to get it working case insensitive. 但我想让它工作不敏感。
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'中的字母是什么,我都需要用'sai'替换'radha'。
Could use a regular expression. 可以使用正则表达式。 Just add (?i) before your string to ignore case.
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”);
You can "(?i)" pattern in front of a string to ignore the case. 您可以在字符串前面“(?i)”模式以忽略大小写。
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”。
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: 要么:
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(我使用的是版本3.6):
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.6</version>
</dependency>
您可以使用String类中的equalsIgnoreCase(string)
方法来实现您的目的。
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