String multiLine = """ Line 1 Line 2 Line 3 """; 6️⃣ 布尔字面量(Boolean Literals) 布尔类型只有两个字面量: boolean isJavaFun = true; boolean isSkyGreen = false; 7️⃣ null 字面量(Null Literal) null 只能用于 引用类型(对象),表示“没有值”: String name = null; Integer nu...
String myString = "Behold, a string literal!"; 1. 2. 3. 没什么新鲜的吧? 但是,传统的字符串文字有一些不便的限制。 首先,整个文字只需要一行。 这对于简单的短字符串是可以的,但是对于较长的短字符串,则需要诉诸于连接多个字符串文字。 如果您还想包含换行符,则需要添加\ n。 String myString = "Th...
The decision to choose, how to create multiline strings, largely depends on the Java version we are using. If we are using Java 15 or later, then there is no reason to not use the Text Blocks. Before Java 15, String concatenation was a preferred method until the introduction ofStringJoine...
Comments also don't work in a text block, because everything inside is literal text. // this is a comment String string = """ // this is not a comment :( this is text :( /* this is not a comment either */ hello this is text""" // now this is a comment again Indentation ...
MAP(object, string, int, int):四个参数分别是索引值,数据集的名字,索引值所在列序号,返回值所在列序号。根据数据集的名字,找到对应的数据集,找到其中索引列的值为key所对应的返回值。数据集的查找方式是依次从报表数据集找到服务器数据集。索引列序号与返回值序列号的初始值为1。示例:MAP(1001, "employee",...
还有一个模式Pattern.LITERAL,在此模式下,正则表达式字符串中的元字符将失去特殊含义,被看做普通字符。Pattern有一个静态方法: publicstaticString quote(String s) quote()的目的是类似的,它将s中的字符都看作普通字符。我们在上节介绍过\Q和\E,\Q和\E之间的字符会被视为普通字符。quote()基本上就是在字符串...
Multiline mode can also be enabled via the embedded flag expression(?m). See Also: Constant Field Values LITERAL public static final int LITERAL Enables literal parsing of the pattern. When this flag is specified then the input string that specifies the pattern is treated as a sequence of lit...
Literal Obsolete. Enables literal parsing of the pattern. Multiline Obsolete. Enables multiline mode. UnicodeCase Obsolete. Enables Unicode-aware case folding. UnicodeCharacterClass Obsolete. This flag is not supported on Android, and Unicode character classes are always used. UnixLines ...
LITERAL 启用模式的文本解析。 MULTILINE 使多行模式。 UNICODE_CASE 使用Unicode的折盒。 UNICODE_CHARACTER_CLASS 使用Unicode版本的预定义字符类别和POSIX字符类。 UNIX_LINES 使UNIX线模式。 public static boolean matches(String regex,CharSequence input) #编译给定的正则表达式,并试图匹配给定的输入反对它。 # ...
String String, enum, java.net.URI, java.net.URL One-letter String char, Character Multiline and Literal Strings String Array List, Set, array. The generic type can be anything that can be converted. Table Custom class, Map<String, Object>Custom...