字符 \0n 匹配八进制值为 0n (0 ≤ n ≤ 7) 的字符。
示例
以下示例显示了字符匹配的用法。
package com.Learnfkpoint;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class CharactersDemo {
private static final String REGEX = "\07";
private static final String INPUT = "abc\007abc";
public static void main(String[] args) {
// 创建一个模式
Pattern pattern = Pattern.compile(REGEX);
</span><span class="com">// 获取匹配器对象</span><span class="pln">
</span><span class="typ">Matcher</span><span class="pln"> matcher </span><span class="pun">=</span><span class="pln"> pattern</span><span class="pun">.</span><span class="pln">matcher</span><span class="pun">(</span><span class="pln">INPUT</span><span class="pun">);</span><span class="pln">
</span><span class="kwd">if</span><span class="pun">(</span><span class="pln">matcher</span><span class="pun">.</span><span class="pln">find</span><span class="pun">())</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="com">//打印匹配的开始索引。</span><span class="pln">
</span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"Match String start(): "</span><span class="pun">+</span><span class="pln">matcher</span><span class="pun">.</span><span class="pln">start</span><span class="pun">());</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
}
}
让我们编译并运行上面的程序，这将产生以下结果 -
Match String start(): 3
