char 和String的转换问题？

下面程序的结果为？
public class String_to_char {
 
	public static void main(String[] args) {
		 String s = "hello";
         char ch[] = s.toCharArray();      
        
         String s1 = new String(ch);         
         System.out.println("\n"+s1);
         
         if(s1.equals(s)){
        	 System.out.print(true);
         }else
        	 System.out.print(false);
     
        
         if(s.equals(ch)){        
        	 System.out.print("true");
         }else{
        	 System.out.print("false");    
         }
         
         char a1[] ={'h','e','l','l','o'}; 
         if(ch.equals(a1)){
        	 System.out.print("true");
         }else{
        	 System.out.print("false");  
         }
         
         
         
	}

}