Java StringBuffer appendCodePoint()方法及实例

StringBuffer类的appendCodePoint()方法 将codePoint参数的字符串表示附加到这个序列中，为此我们需要有ASCII表的前提知识，因为只有这样我们才能感知输出，为什么特定的文字被附加，因为已经有一个整数值被分配。

--> appendCodePoint() Method
    --> StringBuffer Class
        --> java.lang Package

语法

public StringBuffer appendCodePoint(int cp)

参数： 该方法接受一个整数类型的单一参数 cp ，并指的是Unicode码位。

返回类型： 该方法在附加了代码点所代表的字符串后返回该对象。

示例

输入: StringBuffer = Apple
int cp = 65
输出: AppleA

输入: StringBuffer = GeeksforGeeks
int cp = 156
输出: GeeksforGeeks?

解释： 因为65是’A’的ASCII值，156是’?’的ASCII值。

例1 :

// Java program to illustrate appendCodePoint() Method
// of StringBuffer class
 
// Importing required classes
import java.lang.*;
 
// Main class
public class GFG {
 
    // Main drive method
    public static void main(String[] args)
    {
 
        // Reading passed string
        StringBuffer sbf
            = new StringBuffer("Geeksforgeeks");
 
        // Printing the string
        System.out.println("String buffer = " + sbf);
 
        // Appending the CodePoint as String to the string
        // buffer
        sbf.appendCodePoint(65);
 
        // Printing the string again after
        // appending codePoint as string
        System.out.println("After appending CodePoint is = "
                           + sbf);
    }
}

输出

String buffer = Geeksforgeeks
After appending CodePoint is = GeeksforgeeksA

例2 :

// Java Program to Illustrate appendCodePoint() Method
// of StringBuffer class
 
// Importing required classes
import java.lang.*;
 
// Main class
public class GFG {
 
    // Main driver method
    public static void main(String[] args) {
 
        // Reading passed string by creating object of class
        StringBuffer sbf
            = new StringBuffer("Geeksforgeeks");
 
 
        System.out.println("String buffer = " + sbf);
 
        // Here it appends the CodePoint as
        // string to the string buffer
        sbf.appendCodePoint(54);
 
        System.out.println("After appending CodePoint is = "
                           + sbf);
    }
}

输出

String buffer = Geeksforgeeks
After appending CodePoint is = Geeksforgeeks6

例3 :

// Java program to illustrate appendCodePoint() Method
// of StringBuffer class
 
// Importing required classes
import java.lang.*;
 
// Main class
public class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
 
        // Reading passed string
        StringBuffer sbf
            = new StringBuffer("Geeksforgeeks");
 
        // Printing string on console
        System.out.println("String buffer = " + sbf);
 
        // Appending the codePoint as string
        // to the string buffer
        sbf.appendCodePoint(43);
 
        // Printing the string on console after
        // appending codepoint as string
        System.out.println("After appending CodePoint is = "
                           + sbf);
    }
}

输出

String buffer = Geeksforgeeks
After appending CodePoint is = Geeksforgeeks+