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Програмування мовою Java
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public class SomeClass {
public static void main (String [] args) {
SomeClass c = new SomeChild1 ();
((SomeClass) c) .print ();
((SomeChild1) c) .print ();
((SomeChild2) c) .print ();
}
public void print () {
System.out.println ( "SomeClass");
}
}
class SomeChild1 extends SomeClass {
public void print () {
System.out.println ( "SomeChild1");
}
}
class SomeChild2 extends SomeClass {
public void print () {
System.out.println ( "SomeChild2");
}
}
(Java)
byte b = 1 + 2;
(Java)
public class SomeClass {
static int x;
public static void main (String [] args) {
SomeClass s = new SomeClass ();
s.test (5);
System.out.println (x);
}
private void test (int x) {
x = this.x + 5;
System.out.print (x);
}
}
(Java)
1 class Square {
2 final double PI = 3.14;
3 double r;
4 double s () {
5 ...
6}
7 ...
public class SomeClass {
public static void main (String [] args) {
int i = 0;
while (i <6) {
if (i> 5) i--;
if (i <4) i ++;
if (i = = 5) i ++;
i ++;
System.out.print (i);
}
}
}
(Java)
class SomeClass { }
class SomeClass2 extends SomeClass { }
Що буде виведено на екран в наступному фрагменті коду:
SomeClass x1 = new SomeClass ();
SomeClass2 x2 = new SomeClass2 ();
System.out.println ((x1 instanceof SomeClass2) + "" + (x2 instanceof SomeClass2));
(Java)
class A {
char ch;
int digit;
}
class abc.Point {
abc.Point (int a, int b) {
x = a;
y = b;
}
int x, y;
...
}
Який буде результат такого прикладу?
abc.Point p1 = new abc.Point (3, 4);
abc.Point p2 = p1;
p1.x = 5;
p1 = new abc.Point (4, 4);
System.out.print (p2.x - p1.x);
(Java)
1 class Square {
2 ...
3 double r;
4 double s () {
5 return PI * this.r * this.r;
6}
7}
class Box {
private int weight = 0;
public int getWeight () {
return weight;
}
void setWeight (int weight) {
weight = weight;
}
}
(Java)