Java中不可打印的字符

Question

請給我一個Java編程中不可打印的字符列表嗎？ 先感謝您。

Answer 1

Java使用Unicode標准，因此您應該詢問Unicode中不可打印的字符。

http://en.wikipedia.org/wiki/Unicode_control_characters

Answer 2

Java字符串是unicode字符串。 Unicode完全沒有“不可打印”字符的概念，但ASCII不可打印范圍以及其他幾個字符被視為Unicode控制字符 。

Answer 3

可以打印空格嗎？ 私人使用區呢？ 請根據您對“可打印”的定義修改代碼：)

import static java.lang.Character.*;

for (int i=0; i<MAX_CODE_POINT; i++) {
    int t = getType(i);
    boolean p = t == CONTROL || t == CONNECTOR_PUNCTUATION || t == CURRENCY_SYMBOL || t == DASH_PUNCTUATION || t == DECIMAL_DIGIT_NUMBER || t == ENCLOSING_MARK || t == END_PUNCTUATION || t == FINAL_QUOTE_PUNCTUATION || t == INITIAL_QUOTE_PUNCTUATION || t == LETTER_NUMBER || t == LOWERCASE_LETTER || t == MATH_SYMBOL || t == MODIFIER_LETTER || t == MODIFIER_SYMBOL || t == OTHER_LETTER || t == OTHER_NUMBER || t == OTHER_PUNCTUATION || t == OTHER_SYMBOL || t == START_PUNCTUATION || t == TITLECASE_LETTER || t == UPPERCASE_LETTER;
    if (!p) {
        System.out.println("Non printable codepoint " + i);
    }
}