Scope, Parameters, References: Sample 1: The file AnInt.java contains the following implementation of the AnInt class: public class AnInt { public int data; } The file TwoInts.java contains the following implementation of the TwoInts class: public class TwoInts { public AnInt obj; public int data; public void update1(AnInt obj) { obj = this.obj; } public void update2(AnInt obj) { this.obj = obj; } public void update3(AnInt obj) { obj.data = data; } public void update4(int data) { obj.data = data; } public void update5(int data) { obj.data = this.data; } public void update6(TwoInts obj) { obj.obj.data = obj.data; } public void update7(TwoInts obj) { obj.data = this.obj.data; } }
The main method in the file MainClass.java uses the above classes: import york.*; public class MainClass { private AnInt a; private AnInt b; private TwoInts x; private TwoInts y; private int data; public static void main(String[] args) { MainClass temp = new MainClass (); } public MainClass() { run(); } private void { a = new b = new x = new y = new refresh () AnInt(); AnInt(); TwoInts(); TwoInts();
a.data = 1; b.data = 2; x.obj = a; x.data = 3; y.obj = b; y.data = 4; data = 5; }
private void run() { refresh(); x.update1(b); York.println("a"+a.data+b.data+x.obj.data+y.data); refresh(); x.update2(b); York.println("b"+a.data+b.data+x.obj.data+y.data); refresh(); x.update3(b); York.println("c"+a.data+b.data+x.obj.data+y.data); refresh(); x.update4(data); York.println("d"+a.data+b.data+x.obj.data+y.data); refresh(); x.update5(data); York.println("e"+a.data+b.data+x.obj.data+y.data); refresh(); x.update6(y); York.println("f"+a.data+b.data+x.obj.data+y.data); refresh(); x.update7(y); York.println("g"+a.data+b.data+x.obj.data+y.data); } } Please write the program outputs below when java MainClass is executed. obj = this.obj; a1214 local variable obj is updated, nothing else b1224 this.obj = obj; obj is b, this.obj becomes b, x.obj becomes b c1314 obj.data = (this.) data; obj is b, data is instance variable d5254 (this.) obj.data = data; obj is a, data is parameter e3234 (this.) obj.data this.data; = obj is a, this.data is instance variable f1414 obj.obj.data = obj.data; obj is y, obj.obj is b g1211 obj.data = this.obj.data; obj is y, this is x, this.obj is a
a)
a
b
data x
5
y
AnInt data
1
AnInt data
2
TwoInts update1() obj this obj data
3
TwoInts obj data
4
b)
a b data x AnInt data
1 5
y
AnInt data
2
TwoInts update2() obj this obj data
3
TwoInts obj data
4
c)
a
b
data x
5
y
AnInt data
1
AnInt data
2 3
update3() obj this obj data
3
d)
a b data x AnInt data
1 5
AnInt data
2
update4() obj this data
5
TwoInts obj data
TwoInts
4
5
y
TwoInts obj
3
TwoInts
data
data
4
e)
a
b
data x
5
y
AnInt data
1 3
AnInt data
2
TwoInts update5() obj this data
5
TwoInts obj
data
3
data
4
f)
a b data x AnInt data
1 5
y
AnInt data
2 4
TwoInts update6() obj this obj data
3
TwoInts obj data
4
g)
a
b
data x
5
y
AnInt data
1
AnInt data
2
TwoInts update7() obj this obj data
3
TwoInts obj
data
4 1
Sample 2: The file AnInt.java contains the following implementation of the AnInt class: public class AnInt { public int data; public void update(IndInt indInt) { indInt.obj.data = data; } }
The file IndInt.java contains the following implementation of the IndInt class: public class IndInt { public AnInt obj; public void update(AnInt other) { other.update(this); } }
The main method in the file MainClass.java uses the above classes: import york.*; public class MainClass { public static void main(String[] args) { IndInt a = new IndInt(); IndInt b = new IndInt(); AnInt x = new AnInt(); AnInt y = new AnInt(); AnInt z = new AnInt(); x.data = 5; y.data = 7; a.obj = y; b.obj = z; z.data = y.data; y.data = 10; a.obj.data = 3; a.obj = x; York.println(a + a.obj.data + b.obj.data + x.data + y.data + z.data); b.update(a.obj); York.println(b + a.obj.data + b.obj.data + x.data + y.data + z.data); } } Please write the program outputs below when java MainClass is executed. a57537 b55535
a57537
IndInt
a b
obj
IndInt obj
AnInt
x
data
5
AnInt
y
data
7, 10, 3
AnInt
z
data
7
5
b55535 b.update(a.obj) b.update(x) x.update(b) b.obj.data = x.data z.data = 5