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 classesimport java.lang.*; // Main classpublic 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 = GeeksforgeeksAfter appending CodePoint is = GeeksforgeeksA

例2 :

// Java Program to Illustrate appendCodePoint() Method// of StringBuffer class // Importing required classesimport java.lang.*; // Main classpublic 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 = GeeksforgeeksAfter appending CodePoint is = Geeksforgeeks6

例3 :

// Java program to illustrate appendCodePoint() Method// of StringBuffer class // Importing required classesimport java.lang.*; // Main classpublic 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 = GeeksforgeeksAfter appending CodePoint is = Geeksforgeeks+