Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Consider the following Java classes. Assuming that all of these classes are in the same directory. What will be the output when TestClassC is compiled and run.

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1 import java.util.ArrayList;
2 public class ClassA {
3 protected ArrayList<String> strings;
public ClassA() {
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strings = new ArrayList<String>
6 ( ); }
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public void add(String s) {
strings.add(s);
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8 }
}
public String toString() {
String temp = "";
for (Strings
}
1 public class ClassB extends ClassA {
public ClassB() {
super();
strings) {
temp + s + "\n";
}
return temp;
}
public void add(String s) {
strings.add(s. to LowerCase());
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Transcribed Image Text:9 10 11 12 13 14 15 16 17 } 123 1 import java.util.ArrayList; 2 public class ClassA { 3 protected ArrayList<String> strings; public ClassA() { 4 5 strings = new ArrayList<String> 6 ( ); } 7 8 2 public void add(String s) { strings.add(s); 3 4 5 6 7 8 } } public String toString() { String temp = ""; for (Strings } 1 public class ClassB extends ClassA { public ClassB() { super(); strings) { temp + s + "\n"; } return temp; } public void add(String s) { strings.add(s. to LowerCase());
1 public class ClassC extends ClassB {
2 public ClassC() {
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15}
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10}
}
super();
}
public String toString() {
String temp = "";
for (int i = 0; i < strings.size(); i++) {
temp += "#" + strings.get(i) + "#";
if (i < strings.size() - 1) {
temp + "\n";
}
1 class TestClassC {
2
3
}
}
return temp;
public static void main(String[] args) {
ClassC myList = new ClassC();
myList.add("STOP");
myList.add("GO");
myList.add("TURN" );
O
System.out.print(myList);
System.out.println("all done");
expand button
Transcribed Image Text:1 public class ClassC extends ClassB { 2 public ClassC() { 4 5 6 7 8 9 10 11 12 13 14 15} 9 10} } super(); } public String toString() { String temp = ""; for (int i = 0; i < strings.size(); i++) { temp += "#" + strings.get(i) + "#"; if (i < strings.size() - 1) { temp + "\n"; } 1 class TestClassC { 2 3 } } return temp; public static void main(String[] args) { ClassC myList = new ClassC(); myList.add("STOP"); myList.add("GO"); myList.add("TURN" ); O System.out.print(myList); System.out.println("all done");
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