Character.isISOControl()方法，用 Java 举例
原文:https://www . geeksforgeeks . org/character-isisocontrol-method-with-examples-in-Java/
java . lang . character . isisocontrol()是 Java 中的一个内置方法，用于确定指定的字符是否是 ISO 控制字符。如果一个字符的代码在“\u0000”到“\u001F”的范围内或在“\u007F”到“\u009F”的范围内，则该字符被认为是 ISO 控制字符。此方法无法处理补充字符。为了支持所有的 Unicode 字符，包括补充字符，在上述方法中，参数可以是 int 数据类型。
语法:
public static boolean isISOControl(data_type ch)
参数:该函数接受单个参数 ch ，该参数是强制的。它指定要测试的字符。参数可以是 char 或 int 数据类型。
返回值:函数返回一个布尔值。如果字符是国际标准化组织控制字符，布尔值为真，否则为假。
下面的程序说明了上述方法:
程序 1:
// java program to demonstrate
// Character.isISOControl() method
// when the parameter is a character
import java.lang.*;
public class gfg {
public static void main(String[] args)
{
// create 2 char primitives c1, c2 and assign values
char c1 = '-', c2 = '\u0017';
// assign isISOControl results of c1
// to boolean primitives bool1
boolean bool1 = Character.isISOControl(c1);
if (bool1)
System.out.println(c1 + " is an ISO control character");
else
System.out.println(c1 + " is not an ISO control character");
// assign isISOControl results of c2
// to boolean primitives bool2
boolean bool2 = Character.isISOControl(c2);
if (bool2)
System.out.println(c2 + " is an ISO control character");
else
System.out.println(c2 + " is not an ISO control character");
}
}
Output:
- is not an ISO control character
is an ISO control character
程序 2:
// java program to demonstrate
// Character.isISOControl(char ch) method
// when the parameter is an integer
import java.lang.*;
public class gfg {
public static void main(String[] args)
{
// create 2 char primitives c1, c2 and assign values
int c1 = 0x008f;
int c2 = 0x0123;
// assign isISOControl results of c1
// to boolean primitives bool1
boolean bool1 = Character.isISOControl(c1);
if (bool1)
System.out.println(c1 + " is an ISO control character");
else
System.out.println(c1 + " is not an ISO control character");
// assign isISOControl results of c2
// to boolean primitives bool2
boolean bool2 = Character.isISOControl(c2);
if (bool2)
System.out.println(c2 + " is an ISO control character");
else
System.out.println(c2 + " is not an ISO control character");
}
}
Output:
143 is an ISO control character
291 is not an ISO control character
参考:https://docs . Oracle . com/javase/7/docs/API/Java/lang/character . html # isISOControl(char)
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