如果更多输入可以将正匹配更改为负匹配,则java.util.regex.Matcher.requireEnd()
方法返回true
。
声明
以下是java.util.regex.Matcher.requireEnd()
方法的声明。
public boolean requireEnd()
返回值
当且仅当更多输入可以将正匹配转换为负匹配时才为真。
示例
以下示例显示了java.util.regex.Matcher.requireEnd()
方法的用法。
package com.yiibai;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MatcherDemo {
private static String REGEX = "(a*b)(foo)";
private static String INPUT = "aabfooaabfooabfoob";
private static String REPLACE = "-";
public static void main(String[] args) {
Pattern pattern = Pattern.compile(REGEX);
// get a matcher object
Matcher matcher = pattern.matcher(INPUT);
while(matcher.find()) {
//Prints the offset after the last character matched.
System.out.println("First Capturing Group, (a*b) Match String end(): "+matcher.end());
System.out.println("requireEnd(): "+matcher.requireEnd());
}
}
}
编译并运行上面的程序,这将产生以下结果 -
First Capturing Group, (a*b) Match String end(): 6
requireEnd(): false
First Capturing Group, (a*b) Match String end(): 12
requireEnd(): false
First Capturing Group, (a*b) Match String end(): 17
requireEnd(): false