java - 正则表达式匹配返回 false

Question

下面的代码执行正常，我能够获取所有值，但 matcher.matches() 返回 false。

final Matcher matcher = Pattern.compile("\\((-?\\d+),(-?\\d+)\\)").matcher("(8,0),(0,-1),(7,-2),(1,1)");

System.out.println("Matches: " + matcher.matches());
int index = 0;
while (matcher.find()) {            
    point[index] = new Point(Integer.parseInt(matcher.group(1)), Integer.parseInt(matcher.group(2)));
    index++;
}

谁能告诉我为什么 matcher.matches() 返回 false

Answer 1

尝试使用此正则表达式进行匹配:^\(-?\d+,-?\d+\)(,\s*\(-?\d+,-?\d+\)){3}$

Pattern pattern = Pattern.compile("^\\(-?\\d+,-?\\d+\\)(\\s*,\\(-?\\d+,-?\\d+\\)){3}$");

// this will match
Matcher matcher = pattern.matcher("(8,0),(0,-1),(7,-2),(1,1)");
System.out.println("Matches: " + matcher.matches());

// this will not match
matcher = pattern.matcher("(8,0),(0,-1),(7,-2),(1,1");
System.out.println("Matches: " + matcher.matches());

// neither will this one, which has a dangling comma
matcher = pattern.matcher("(8,0),(0,-1),(7,-2),");
System.out.println("Matches: " + matcher.matches());

// neither will this one, which has too few order pairs
matcher = pattern.matcher("(8,0),(0,-1),(7,-2)");
System.out.println("Matches: " + matcher.matches());

// neither will this one, which has too many order pairs
matcher = pattern.matcher("(8,0),(0,-1),(7,-2),(1,1),(3,-5)");
System.out.println("Matches: " + matcher.matches());