Java中的 StringBuilder appendCodePoint() 方法及示例

StringBuilder 类的appendCodePoint(int codePoint)方法是用于将 codePoint 参数的字符串表示附加到此序列的内置方法。
参数附加到此 StringBuilder 内容，并且对象的长度增加了字符.charCount(codePoint)。效果与将参数中的 int 值转换为 char 数组并将该数组中的字符附加到此字符序列中的效果相同。
句法：

public StringBuilder appendCodePoint(int codePoint)

参数：该方法只接受一个参数codePoint ，它是int类型的值是指一个Unicode码位。
返回值：此方法返回对该对象的引用。
下面的程序说明了Java.lang.StringBuilder.appendCodePoint() 方法：
示例 1：

Java

// Java program to illustrate the
// appendCodePoint(int codePoint)
 
import java.lang.*;
 
public class Geeks {
    public static void main(String[] args)
    {
 
        // create StringBuilder object
        StringBuilder
            str
            = new StringBuilder("GeeksforGeeks");
        System.out.println("StringBuilder = "
                           + str);
 
        // Append 'C'(67) to the String
        str.appendCodePoint(67);
 
        // Print the modified String
        System.out.println("Modified StringBuilder = "
                           + str);
    }
}

输出：

StringBuilder = GeeksforGeeks
Modified StringBuilder = GeeksforGeeksC

示例 2：

Java

// Java program to illustrate the
// appendCodePoint(int codePoint)
 
import java.lang.*;
 
public class Geeks {
    public static void main(String[] args)
    {
 
        // create StringBuilder object
        StringBuilder
            str
            = new StringBuilder("GeeksforGeeks");
        System.out.println("StringBuilder = "
                           + str);
 
        // Append ', '(44) to the String
        str.appendCodePoint(44);
 
        // Print the modified String
        System.out.println("Modified StringBuilder = "
                           + str);
    }
}

输出：

StringBuilder = GeeksforGeeks
Modified StringBuilder = GeeksforGeeks,

参考资料： https: Java/lang/StringBuilder.html#appendCodePoint(int)