匹配javacc正则表达式中的任何UTF-8字母

Question

如何在javacc中编写与任何UTF-8字母匹配的正则表达式？我认为一些正则表达式引擎支持\ p {L}，但这在javacc中不起作用或者我做错了。

public class TestState4 { public static void main(String[] args) { State4 inform = new State4(); String states[][] = inform.getState(); Scanner input = new Scanner(System.in); while (true) { System.out.println("Enter a State or 'None' to exit:"); String state = input.nextLine(); if (state.trim().equalsIgnoreCase("None")) { break; } else { int index = getStateIndex(state, states); if (index != -1) { System.out.printf("Bird: %s \nFlower: %s \n", getBird(index, states), getFlower(index, states)); } else { System.out .println("Please try again, an invalid State was entered."); } } } input.close(); } private static int getStateIndex(String state, String[][] states) { for (int i = 0; i < states.length; i++) { if (state.trim().equalsIgnoreCase(states[i][0])) { return i; } } return -1; } private static String getBird(int index, String[][] states) { return states[index][1]; } private static String getFlower(int index, String[][] states) { return states[index][2]; }}

Answer 1

好的，这是答案，感谢WiktorStribiżew。您需要自己将pL var粘贴到javacc代码中：

TOKEN : { < #UTF_LETTER : [
"a"-"z", 
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] > }