使用find()查找Java中的多个子序列
该find()方法在输入序列中找到与所需模式匹配的多个子序列。该方法在java.util.regex包中提供的Matcher类中提供
给出了使用该find()方法在Java中查找多个子序列的程序，如下所示：
示例
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Demo {
public static void main(String args[]) {
Pattern p = Pattern.compile("the");
Matcher m = p.matcher("eclipses of the sun and the moon");
System.out.println("Subsequence: the");
System.out.println("Sequence: eclipses of the sun and the moon");
System.out.println();
while (m.find()) {
System.out.println("the found at index " + m.start());
}
}
}输出结果
Subsequence: the Sequence: eclipses of the sun and the moon the found at index 12 the found at index 24
现在让我们了解上面的程序。
在字符串序列“日月食”中搜索子序列“the”。然后，该find()方法用于查找子序列是否在输入序列中任意次，并打印出所需的结果。演示此代码段如下：
Pattern p = Pattern.compile("the");
Matcher m = p.matcher("eclipses of the sun and the moon");
System.out.println("Subsequence: the" );
System.out.println("Sequence: eclipses of the sun and the moon" );
System.out.println();
while (m.find()) {
System.out.println("the found at index " + m.start());
}