java 中 StringBuffer delete 的工作原理

Question

在java中，StringBuffer函数会这样工作 str="hello"好像是指定了str.delete(1,3)。我想知道它是如何工作的，比如它是如何占据位置的

class StringBufferExample4 {  
  public static void main(String args[]) {  
    StringBuffer sb=new StringBuffer("Hello");  
    sb.delete(1,3);  
    System.out.println(sb); 
  }  
}

它给出了输出

Hlo

如何？

Answer 1

StringBuffer delete() method removes the characters in a substring of this StringBuffer. The substring begins at the specified start and extends to the character at index end - 1 or to the end of the StringBuffer if no such character exists.

来自：http://www.tutorialspoint.com/java/stringbuffer_delete.htm

java 中 StringBuffer delete 的工作原理

How StringBuffer delete works in java

java

stringbuffer