📜  Java中的字符.isLowSurrogate() 方法及示例

📅  最后修改于: 2022-05-13 01:54:29.284000             🧑  作者: Mango

Java中的字符.isLowSurrogate() 方法及示例

Java.lang。 字符.isLowSurrogate(char ch)是Java中的一个内置方法,它确定给定的 char 值是否是 Unicode 低代理代码单元(也称为尾随代理代码单元)。这些值本身并不表示字符,而是用于表示 UTF-16 编码中的补充字符。

句法:

public static boolean isLowSurrogate(char ch)

参数:该函数接受一个强制参数ch ,该参数指定要测试的字符。

返回值:函数返回一个布尔值。如果 char 值介于 MIN_LOW_SURROGATE 和 MAX_LOW_SURROGATE 之间,则返回值为True ,否则为False

下面的程序说明了字符.isLowSurrogate() 方法:

方案一:

// 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);
    }
}
输出:
c1 is a Unicode low-surrogate ? true
h is a Unicode low-surrogate ? false

方案二:

// 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);
    }
}
输出:
c1 is a Unicode low-surrogate ? true
x is a Unicode low-surrogate ? false

参考: https: Java/lang/ 字符.html#isLowSurrogate(char)