Which of the following is true regarding a class and interface types?

Which of the following statements about using a PrintWriter object is NOT true?

What operation is least efficient in a LinkedList?

When you start a Java program from a command line and supply argument values, the values ____.

Which of the following statements about using a PrintWriter object is NOT true?

What operation is least efficient in a LinkedList?

All hamsters are rodents and all rodents are mammals.  What hierarchy best captures this information?

Consider the following class hierarchy: public final class Shape { private String mycolor; public Shape(String mycolor) { this.type = mycolor; } public String getColor() { return mycolor; } } public class Triangle extends Shape { public Triangle(String mycolor) { super(mycolor); } } } What is wrong with this class hierarchy definition?

Consider the following class hierarchy: public final class Shape { private String mycolor; public Shape(String mycolor) { this.type = mycolor; } public String getColor() { return mycolor; } } public class Triangle extends Shape { public Triangle(String mycolor) { super(mycolor); } } } What is wrong with this class hierarchy definition?

What can be determined about obj from the code below? JMenuItem menuItem = new JMenuItem(“Exit”); menuItem.addActionListener(obj);