1. WIKI教程
2. Java.lang包
3. int codePointAt(int index)

int codePointAt(int index)

描述 (Description)

java.lang.StringBuffer.codePointAt()方法返回指定index处的字符（Unicode代码点）。索引引用char值（Unicode代码单元），范围从0 to length() - 1 。

声明 (Declaration)

以下是java.lang.StringBuffer.codePointAt()方法的声明

public int codePointAt(int index)

参数 (Parameters)

index - 这是char值的索引。

返回值 (Return Value)

此方法返回索引处字符的代码点值。

异常 (Exception)

NA

例子 (Example)

以下示例显示了java.lang.StringBuffer.codePointAt（）方法的用法。

package com.iowiki;
import java.lang.*;
public class StringBufferDemo {
   public static void main(String[] args) {
      StringBuffer buff = new StringBuffer("TUTORIALS");
      System.out.println("buffer = " + buff);
      // returns the codepoint at index 5
      int retval = buff.codePointAt(5);
      System.out.println("Character(unicode point) = " + retval);
      buff = new StringBuffer("amrood admin ");
      System.out.println("buffer = " + buff);
      // returns the codepoint at index 6 i.e whitespace character
      retval = buff.codePointAt(6);
      System.out.println("Character(unicode point) = " + retval);
   }
}

让我们编译并运行上面的程序，这将产生以下结果 -

buffer = TUTORIALS
Character(unicode point) = 73
buffer = amrood admin
Character(unicode point) = 32