编译有错误,求教!!!!

[paomoyu]

public class MyAppp
{
public static void main(String[] args)
{
String str1 = new String("this is a string");
String str2 = new String("this is string");

if (str1.equalTo(str2))
{
System.out.println("str1和str2相等");
}
else
{
System.out.println("str1和str2不相等");
}
if (str1.StartsWith("this"))
{
System.out.println("str1以'this'开头");
}
}
}

编译有错误,请高手们给我看看,是什么错误?

[helpall]

equalTo==>equals
StartsWith==>startsWith

[helpall]

equalTo==>equals
StartsWith==>startsWith

[paomoyu]

谢谢,我立刻给分,equalTo==>equals StartsWith==>startsWith
有什么区别?

[helpall]

equals===>两者完全相等则为真.
s1.startsWith(s2) ===>s1的开头是由s2组成的则为真