Джава надо исправить ошибки

public class main {
public static void main(String[] args) {
byte[] str_byte;
char[] chars = {'s','t','u','d','e','n','t'};
String HW = "Hello"
str_byte = HW.getBytes);
System.out.println("Hello - "+HW.length());
for(int i=0;i<HW.length();i++){System.out.println("byte["+i+"]="+str_byte[i]);} String a = new String(chars,0,7);
System.out.println(">> "+a)
str_byte = a.getBytes);
System.out.println("student - "+a.length())
for(int i=0;i<a.length();i++){System.out.println("byte["+i+"]="+str_byte[i]) }
} }