SWE 619 In Class Exercise Number 7A

Given the following variable declarations, independently consider the given 6 sequences of Java instructions. 
    String           string = "bat";
    Integer          x = 7;
    Object[]         objects;
    List             rawList;
    List < Object >  objectList;
    List < String >  stringList;
Identify any code that results in a compiler error or warning.
Identify any code that raises a runtime exception.
Once a compiler error is noted, you do not need to analyze the sequence further. 
  1. objects = new String[1]; 
objects[0] = string;     
objects[0] = x;        

  2. objects = new Object[1];
objects[0] = string;   
objects[0] = x;     

  3. stringList = new ArrayList < String >();
stringList.add(string) ;

  4. objectList = new ArrayList < String >();
objectList.add(string) ;

  5. objectList = new ArrayList < Object >(); 
objectList.add(string) ;      
objectList.add(x) ;        

  6. rawList = new ArrayList();
rawList.add(string) ;    
rawList.add(x) ;