StringBuffer declaration and initialization showing error in Java

Question

I am working with StringBuffer. Using NetBeans 8.1 IDE.

Code I wrote:

package stringbuffer;

import java.lang.*;

public class StringBuffer {
    public static void main(String[] args) {
       StringBuffer sb=new StringBuffer("hello");
    }
}

But this is showing error like this:

What's my problem?

Answer 1

You've named your class StringBuffer. So it shadows java.lang.StringBuffer (and you never have to import java.lang.*). Rename your class, or use the fully qualified StringBuffer name.

public class StringBuffer {
    public static void main(String[] args) {
       java.lang.StringBuffer sb=new java.lang.StringBuffer("hello");
    }
}

or

public class MyStringBuffer {
    public static void main(String[] args) {
       StringBuffer sb=new StringBuffer("hello");
    }
}