Java Character.isLowSurrogate()用法及代碼示例

java.lang.Character.isLowSurrogate(char ch)是java中的一種內置方法，它確定給定的char值是否為Unicode low-surrogate代碼單元(也稱為trailing-surrogate代碼單元)。這樣的值本身並不表示字符，而是用於UTF-16編碼中的補充字符。

用法:

public static boolean isLowSurrogate(char ch)

參數：該函數接受一個強製性參數ch，該參數指定要測試的字符。

返回值：該函數返回一個布爾值。如果char值介於MIN_LOW_SURROGATE和MAX_LOW_SURROGATE(含)之間，則返回的值為True，否則為False。

以下示例程序旨在說明Character.isLowSurrogate()方法：

示例1:

// Java program to illustrate the 
// Character.isLowSurrogate() method 
import java.lang.*; 
  
public class gfg { 
  
    public static void main(String[] args) 
    { 
  
        // create 2 char primitives c1, c2 
        char c1 = '\udc25', c2 = 'h'; 
  
        // assign isLowSurrogate results of 
        // c1, c2 to boolean primitives bool1, bool2 
        boolean bool1 = Character.isLowSurrogate(c1); 
        System.out.println("c1 is a Unicode low-surrogate ? " + bool1); 
  
        boolean bool2 = Character.isLowSurrogate(c2); 
        System.out.println(c2 + " is a Unicode low-surrogate ? " + bool2); 
    } 
}

輸出：

c1 is a Unicode low-surrogate ? true
h is a Unicode low-surrogate ? false

示例2:

// Java program to illustrate the 
// Character.isLowSurrogate() method 
import java.lang.*; 
  
public class gfg { 
  
    public static void main(String[] args) 
    { 
  
        // create 2 char primitives c1, c2 
        char c1 = '\udc29', c2 = 'x'; 
  
        // assign isLowSurrogate results of 
        // c1, c2 to boolean primitives bool1, bool2 
        boolean bool1 = Character.isLowSurrogate(c1); 
        System.out.println("c1 is a Unicode low-surrogate ? " + bool1); 
  
        boolean bool2 = Character.isLowSurrogate(c2); 
        System.out.println(c2 + " is a Unicode low-surrogate ? " + bool2); 
    } 
}

輸出：

c1 is a Unicode low-surrogate ? true
x is a Unicode low-surrogate ? false

參考： https://docs.oracle.com/javase/7/docs/api/java/lang/Character.html#isLowSurrogate(char)

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注：本文由純淨天空篩選整理自Twinkl Bajaj大神的英文原創作品 Character.isLowSurrogate() method in Java with examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。