To forum των φοιτητών της Σχολής Εφαρμοσμένων Μαθηματικών & Φυσικών Επιστημών του Εθνικού Μετσόβιου Πολυτεχνείου
https://semfe.gr/forum/
Κώδικας: Επιλογή όλων
public class Log10Approx
{
public static int log10Approx(int x)
{
int y=0;
int i=1;
while(i<x)
{
i=i*10;
if(i>x)
return y;
y++;
}
return y;
}
}
Κώδικας: Επιλογή όλων
public class Has2by2ZeroBlock
{
public static void has2by2ZeroBlock(int a[][])
{
int r=a.length-1;
int c=a[0].length -1;
for(int i=0;i<r;i++)
{for(int j=0;j<c;j++)
{if((a[i][j]==0)&&(a[i][j+1]==0)&&(a[i+1][j]==0)&&(a[i+1][j+1]==0))
{System.out.println("( " + i + "," + j + " )" );
break;}
}
}
}
}
Κώδικας: Επιλογή όλων
public class Triangle
{
// instance variables - replace the example below with your own
private Point a;
private Point b;
private Point c;
public Triangle(Point a,Point b,Point c)
{
this.a=a;
this.b=b;
this.c=c;
}
public int perimeter()
{
return a.distanceFrom(b)+b.distanceFrom(c)+c.distanceFrom(a);
}
public void translate(boolean direction,int dist)
{
if(direction)
{
a.setX(a.getX()+dist);
b.setX(b.getX()+dist);
c.setX(c.getX()+dist);
}
else
{
a.setY(a.getY()+dist);
b.setY(b.getY()+dist);
c.setY(c.getY()+dist);
}
}
public String toString()
{
return " A " + a + " , B " + b + " , C " + c ;
}
}
Κώδικας: Επιλογή όλων
public class LabFroup
{
// instance variables - replace the example below with your own
private Student list[];
private int size;
/**
* Constructor for objects of class LabFroup
*/
public LabFroup()
{
// initialise instance variables
list = new Student[25];
size=0;
}
public boolean isFull()
{
return (size==25);
}
public void insert(Student s)
{
if(!isFull())
{
list[size]=s;
size++;
}
else
System.out.println( " The list is full ");
}
public void printStudents()
{
for(int i=0;i<size;i++)
System.out.println(list[i]);
}
public int size()
{
return size;
}
public boolean isInLabGroup(String id)
{
for(int i=0;i<size;i++)
if (list[i].getId()==id)
return true;
return false;
}
}
Κώδικας: Επιλογή όλων
import java.io.*;
/**
* tou 2008
*/
public class MyFileReader
{
public static void printFile(String file1)
{
File in=new File(file1);
try
{
BufferedReader r=new BufferedReader(new FileReader(in));
int count=0;
String str=r.readLine();
while(str!=null)
{
System.out.println(str);
count++;
str=r.readLine();
}
System.out.println("No of lines: " + count);
}
catch (IOException e)
{
System.out.println("File is not readable");
}
}
}
Κώδικας: Επιλογή όλων
public void kap1(String file1)throws IOException
{
File toPrint=new File(file1);
FileReader in= new FileReader(toPrint);
BufferedReader br= new BufferedReader(in);
int count=0;
while((in.read())!=-1)
{
System.out.println(br.readLine());
count++;
}
System.out.println(count);
br.close();
in.close();
}
Κώδικας: Επιλογή όλων
public void kap2(String file1)throws IOException
{
File toPrint=new File(file1);
FileReader in= new FileReader(toPrint);
BufferedReader reader= new BufferedReader(in);
String text=null;
int count=0;
while ((text = reader.readLine()) != null)
{
System.out.println(text);
count++;
}
System.out.println(count);
reader.close();
in.close();
}
) , αυτός είναι ο τρόπος που μας έγραψε η υπεύθυνη
Κώδικας: Επιλογή όλων
public abstract class Shape
{
// instance variables - replace the example below with your own
private int x;
private int y;
/**
* Constructor for objects of class Shape
*/
public Shape(int x,int y)
{
this.x=x;
this.y=y;
}
public void setX(int newX)
{
x=newX;
}
public void setY(int newY)
{
y=newY;
}
public int getX()
{
return x;
}
public int getY()
{
return y;
}
public abstract double area();
public abstract void scale(double s);
}Κώδικας: Επιλογή όλων
public class Rectangle extends Shape implements Movable
{
private double a;
private double b;
/**
* Constructor for objects of class Rectangle
*/
public Rectangle(int x,int y,int a,int b)
{
super(x,y);
this.a=a;
this.b=b;
}
public void setA(double newA)
{
a=newA;
}
public void setB(double newB)
{
b=newB;
}
public double getA()
{
return a;
}
public double getB()
{
return b;
}
public double area()
{
// put your code here
return (a*a)+ (b*b);
}
public void scale(double s)
{
a=a*Math.sqrt(s);
b=b*Math.sqrt(s);
}
public void moveTo(int x,int y)
{
setX(x);
setY(y);
}
}
Κώδικας: Επιλογή όλων
public class Circle extends Shape implements Movable
{
// instance variables - replace the example below with your own
private double r;
public Circle(int x,int y,int r)
{
super(x,y);
this.r=r;
}
public void setR(int newR)
{
r=newR;
}
public double getR()
{
return r;
}
public double area()
{
return 2*Math.PI*r;
}
public void moveTo(int x,int y)
{
setX(x);
setY(y);
}
public void scale(double s)
{
r=(s*area())/(2*Math.PI);
}
}
Κώδικας: Επιλογή όλων
public interface Movable
{
void moveTo(int x,int y);
}