問題1
public class TestLoop {
public static void main(String[] args) {
int array[] = {0, 1, 2, 3, 4};
int key = 3;
for (int pos = 0; pos < array.length; ++pos) {
if (array[pos] == key) {
break;
}
}
System.out.print("Found " + key + "at " + pos);
} }
public class TestLoop {
public static void main(String[] args) {
int array[] = {0, 1, 2, 3, 4};
int key = 3;
for (int pos = 0; pos < array.length; ++pos) {
if (array[pos] == key) {
break;
}
}
System.out.print("Found " + key + "at " + pos);
} }
正確答案: D
問題2
正確答案: D,E,F
問題3
public class Painting {
private String type;
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public static void main(String[] args) {
Painting obj1 = new Painting();
Painting obj2 = new Painting();
obj1.setType(null);
obj2.setType("Fresco");
System.out.print(obj1.getType() + " : " + obj2.getType());
}
}
public class Painting {
private String type;
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public static void main(String[] args) {
Painting obj1 = new Painting();
Painting obj2 = new Painting();
obj1.setType(null);
obj2.setType("Fresco");
System.out.print(obj1.getType() + " : " + obj2.getType());
}
}
正確答案: A
問題4
正確答案: A,C,D
問題5
正確答案: D
問題6
正確答案: B,C,D
問題7
1.ArrayList<Integer> list = new ArrayList<>(1);
2.list.add(1001);
3.list.add(1002);
4.System.out.println(list.get(list.size()));
1.ArrayList<Integer> list = new ArrayList<>(1);
2.list.add(1001);
3.list.add(1002);
4.System.out.println(list.get(list.size()));
正確答案: D
問題8
public class MyClass { public static void main(String[] args) { while (int ii = 0; ii < 2) { ii++;
System.out.println("ii = " + ii); } }
}
public class MyClass { public static void main(String[] args) { while (int ii = 0; ii < 2) { ii++;
System.out.println("ii = " + ii); } }
}
正確答案: A
問題9
Given:
package p1;
public interface DoInterface { void method1(int n1); // line n1
}
package p3;
import p1.DoInterface;
public class DoClass implements DoInterface { public DoClass(int p1) { } public void method1(int p1) { } // line n2 private void method2(int p1) { } // line n3
}
public class Test {
public static void main(String[] args) {
DoInterface doi= new DoClass(100); // line n4
doi.method1(100);
doi.method2(100);
}
}
Given:
package p1;
public interface DoInterface { void method1(int n1); // line n1
}
package p3;
import p1.DoInterface;
public class DoClass implements DoInterface { public DoClass(int p1) { } public void method1(int p1) { } // line n2 private void method2(int p1) { } // line n3
}
public class Test {
public static void main(String[] args) {
DoInterface doi= new DoClass(100); // line n4
doi.method1(100);
doi.method2(100);
}
}
正確答案: D
問題10
public class Test {
public static void main(String[] args) {
int arr[] = new int[4];
arr[0] = 1;
arr[1] = 2;
arr[2] = 4;
arr[3] = 5;
int sum = 0;
try {
for (int pos = 0; pos <= 4; pos++) {
sum = sum + arr[pos];
}
} catch (Exception e) {
System.out.println("Invalid index");
}
System.out.println(sum); } }
public class Test {
public static void main(String[] args) {
int arr[] = new int[4];
arr[0] = 1;
arr[1] = 2;
arr[2] = 4;
arr[3] = 5;
int sum = 0;
try {
for (int pos = 0; pos <= 4; pos++) {
sum = sum + arr[pos];
}
} catch (Exception e) {
System.out.println("Invalid index");
}
System.out.println(sum); } }
正確答案: A
問題11
Given:
Given:
正確答案: B
問題12
Given:
public class FieldInit { char c; boolean b; float f; void printAll() { System.out.println("c = " + c); System.out.println("c = " + b); System.out.println("c = " + f); }
public static void main(String[] args) { FieldInit f = new FieldInit(); f.printAll();
} }
Given:
public class FieldInit { char c; boolean b; float f; void printAll() { System.out.println("c = " + c); System.out.println("c = " + b); System.out.println("c = " + f); }
public static void main(String[] args) { FieldInit f = new FieldInit(); f.printAll();
} }
正確答案: B
問題13
正確答案: B,C
問題14
正確答案: B