6.6strchange.java

JAVA程序设计的源代码

public class StrChange
{    
public static void main(String []args)
{
StringBuffer s1=new StringBuffer("Hello,Java!");
s1.setCharAt(1,'e');    //将下标为1的字符设为e
System.out.println(s1);
s1.replace(1,5,"i");    //将下标为1到4字符串替换为i
System.out.println(s1);
s1.delete(0,3);    //删除前三个字符
System.out.println(s1);
s1.deleteCharAt(4);    //删除下标为4的字符
System.out.println(s1);
}
}