java string replace regex
AI 回答
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1. 替换字符串中的所有匹配项:
```java
String original = "hello world";
String replaced = original.replaceAll("world", "Java");
```
2. 替换第一个匹配项:
```java
String original = "hello world, hello Java";
String replaced = original.replaceFirst("hello ", "Hi ");
```
3. 使用正则表达式替换:
```java
String original = "a1b2c3";
String replaced = original.replaceAll("\\d", "x");
```
```java
String original = "hello world";
String replaced = original.replaceAll("world", "Java");
```
2. 替换第一个匹配项:
```java
String original = "hello world, hello Java";
String replaced = original.replaceFirst("hello ", "Hi ");
```
3. 使用正则表达式替换:
```java
String original = "a1b2c3";
String replaced = original.replaceAll("\\d", "x");
```
没有找到「java string replace regex」相关的内容
建议:检查关键词是否有错别字,或换一个更常见的说法。