errors in java program

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JavaSE

JavaSE6

hi friends, when i am trying to execute the below java program,getting an errors like
"

Main.java:6: ‘)’ expected
 public void go(String… y, int x) {
 ^
Main.java:6: ‘;’ expected
 public void go(String… y, int x) {
 ^
2 errors"

java code is

public class Demo
{
    public static void main(String args[])
    {
        new Demo().go("hi",1);
        new Demo().go("hi","world",2);
    }
    public void go(String y,int x)
    {
        System.out.print(y[y.length-1]+"");
    }
}

please help me,i am new to java

thanks in advance.