Java中的字符.isUnicodeIdentifierPart() 方法及示例
Java.lang。 字符.isUnicodeIdentifierPart()是Java中的一个内置方法,用于确定指定字符是否可能是 Unicode 标识符的一部分,而不是第一个字符。
当且仅当以下语句之一为真时,字符才可能是 Unicode 标识符的一部分:
- 它是一个连接标点符号(例如'_')
- 这是一个数字
- 这是一封信
- 它是一个组合标记
- isIdentifierIgnorable 为该字符返回 true。
- 它是一个数字字母(例如罗马数字字符)
- 它是一个非间距标记
句法:
public static boolean isUnicodeIdentifierPart(datatype character)
参数:该函数接受一个强制参数字符。此参数的数据类型可以是 int 或 char。它指定要测试的字符。
返回值:如果字符可能是 Unicode 标识符的一部分,则此方法返回 true,否则返回 false。
下面的程序说明了Java.lang。字符.isUnicodeIdentifierPart() 方法:
方案 1:当传递的参数是字符时。
// Code to illustrate the Character.isUnicodeIdentifierPart()
import java.lang.*;
public class gfg {
public static void main(String[] args)
{
// Creating character primitives
char char1 = '-';
char char2 = '7';
char char3 = 'g';
boolean bool1 = Character.isUnicodeIdentifierPart(char1);
boolean bool2 = Character.isUnicodeIdentifierPart(char2);
boolean bool3 = Character.isUnicodeIdentifierPart(char3);
String str1 = " Is " + char1 + " a part of Unicode Identifier: " + bool1;
String str2 = " Is " + char2 + " a part of Unicode Identifier: " + bool2;
String str3 = " Is " + char3 + " a part of Unicode Identifier: " + bool3;
// Displaying the strings
System.out.println(str1);
System.out.println(str2);
System.out.println(str3);
}
}
输出:
Is - a part of Unicode Identifier: false
Is 7 a part of Unicode Identifier: true
Is g a part of Unicode Identifier: true
方案 2:当传递的参数是字符时。
// Code to illustrate the Character.isUnicodeIdentifierPart()
import java.lang.*;
public class gfg {
public static void main(String[] args)
{
// Create 2 char primitives c1, c2
char c1 = '~', c2 = '8';
boolean bool1 = Character.isUnicodeIdentifierPart(c1);
boolean bool2 = Character.isUnicodeIdentifierPart(c2);
String str1 = c1 + " may be part of a Unicode identifier is " + bool1;
String str2 = c2 + " may be part of a Unicode identifier is " + bool2;
System.out.println(str1);
System.out.println(str2);
}
}
输出:
~ may be part of a Unicode identifier is false
8 may be part of a Unicode identifier is true
下面的程序说明了字符.isUnicodeIdentifierPart(int codePoint) 方法:
方案一:
// Code to illustrate the Character.isUnicodeIdentifierPart(int codePoint)
import java.lang.*;
public class gfg {
public static void main(String[] args)
{
// Create 2 int primitives c1, c2
int c1 = 0x053d, c2 = 0x7840;
boolean bool1 = Character.isUnicodeIdentifierPart(c1);
boolean bool2 = Character.isUnicodeIdentifierPart(c2);
String str1 = "c1 may be part of a Unicode identifier is " + bool1;
String str2 = "c2 may be part of a Unicode identifier is " + bool2;
// Displaying the strings
System.out.println(str1);
System.out.println(str2);
}
}
输出:
c1 may be part of a Unicode identifier is true
c2 may be part of a Unicode identifier is true
方案二:
// Code to illustrate the Character.isUnicodeIdentifierPart(int codePoint)
import java.lang.*;
public class gfg {
public static void main(String[] args)
{
// Creating 2 int primitives c1, c2
int c1 = 0x065d, c2 = 0x7885;
boolean bool1 = Character.isUnicodeIdentifierPart(c1);
boolean bool2 = Character.isUnicodeIdentifierPart(c2);
String str1 = "c1 may be part of a Unicode identifier is " + bool1;
String str2 = "c2 may be part of a Unicode identifier is " + bool2;
// Displaying the strings
System.out.println(str1);
System.out.println(str2);
}
}
输出:
c1 may be part of a Unicode identifier is true
c2 may be part of a Unicode identifier is true
参考:https: Java/lang/ 字符.html#isUnicodeIdentifierPart(char)