Question: Java Practice Inheritance Problem Assuming that the following classes have been defined: public class Block extends Truck { public void method1() { System.out.println(Block 1); }
Java
Practice Inheritance Problem
Assuming that the following classes have been defined:
public class Block extends Truck {
public void method1() {
System.out.println("Block 1");
}
public void method3() {
System.out.println("Block 3");
}
}
public class Doll extends Ball {
public void method1() {
System.out.println("Doll 1");
}
public void method2() {
System.out.println("Doll 2");
}
}
public class Truck extends Ball {
public void method2() {
System.out.println("Truck 2");
super.method2();
method3();
}
public void method3() {
System.out.println("Truck 3");
}
}
public class Ball {
public void method2() {
System.out.println("Ball 2");
}
public void method3() {
System.out.println("Ball 3");
}
}
And assuming the following variables have been defined:
Ball var1 = new Truck();
Doll var2 = new Doll();
Ball var3 = new Block();
Object var4 = new Ball();
Truck var5 = new Block();
Ball var6 = new Doll();
In the table below, indicate in the right-hand column the output produced by
the statement in the left-hand column. If the statement produces more than one line of output, indicate the line breaks with slashes as in "a/b/c" to indicate three lines of output with "a" followed by "b" followed by "c". If the statement causes an error, fill in the right-hand column with either the phrase "compiler error" or "runtime error" to indicate when the error would be detected.
Statement Output
------------------------------------------------------------
var1.method1(); ____________________________
var2.method1(); ____________________________
var1.method2(); ____________________________
var2.method2(); ____________________________
var3.method2(); ____________________________
var4.method2(); ____________________________
var5.method2(); ____________________________
var1.method3(); ____________________________
var2.method3(); ____________________________
var3.method3(); ____________________________
var4.method3(); ____________________________
var5.method3(); ____________________________
((Doll)var3).method1(); ____________________________
((Block)var5).method1(); ____________________________
((Truck)var3).method1(); ____________________________
((Truck)var3).method3(); ____________________________
((Block)var6).method3(); ____________________________
((Ball)var4).method2(); ____________________________
((Truck)var4).method3(); ____________________________
((Doll)var6).method3(); ____________________________
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