boolean lookingAt()
描述 (Description)
java.time.Matcher.lookingAt()方法尝试将从区域开头开始的输入序列与模式匹配。
声明 (Declaration)
以下是java.time.Matcher.lookingAt()方法的声明。
public boolean lookingAt()
返回值 (Return Value)
当且仅当输入序列的前缀与此匹配器的模式匹配时才返回true。
例子 (Example)
以下示例显示了java.time.Matcher.lookingAt（）方法的用法。
package com.iowiki;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MatcherDemo {
private static final String REGEX = "foo";
private static final String INPUT = "fooooooooooooooooo";
private static Pattern pattern;
private static Matcher matcher;
public static void main( String args[] ) {
pattern = Pattern.compile(REGEX);
matcher = pattern.matcher(INPUT);
System.out.println("Current REGEX is: "+REGEX);
System.out.println("Current INPUT is: "+INPUT);
System.out.println("lookingAt(): "+matcher.lookingAt());
System.out.println("matches(): "+matcher.matches());
}
}
让我们编译并运行上面的程序，这将产生以下结果 -
Current REGEX is: foo
Current INPUT is: fooooooooooooooooo
lookingAt(): true
matches(): false
