Java pratybos

Java

import java.io.*;
import java.util.*;

class Irasas {
	int id;
	String vardas;
	int amzius;

Irasas(int id, String vardas, int amzius) {
		setValues(id, vardas, amzius);
	}

Irasas(String s) {
		StringTokenizer st = new StringTokenizer(s);
		setValues(Integer.parseInt(st.nextToken()), st.nextToken(), Integer.parseInt(st.nextToken()));
	}

public void setValues(int id, String vardas, int amzius) {
		this.id = id;
		this.vardas = vardas;
		this.amzius = amzius;
	}

public String toString() {
		return "" + id + " " + vardas + " " + amzius;
	}

}

class D4 {

public static void main( String[] params )
	{
		Irasas[] masyvas = null;
		
		try { 
			BufferedReader in = new BufferedReader(	new FileReader("D.txt") );
			String s = in.readLine();
			int eiluciu = Integer.parseInt(s);
			
			masyvas = new Irasas[eiluciu];
			
			for(int i=0; i<eiluciu; i++) {
				s = in.readLine();
				masyvas[i] = new Irasas(s);
			}
			in.close();
		} catch(IOException e) {
			System.out.println(e);
		}
		
		for(int i=0; i<masyvas.length; i++ ) {
			System.out.println(masyvas[i]);
		}
		
	}
}

D5.java

import java.io.*;
import java.util.*;

class Irasas {
	int id;
	String vardas;
	int amzius;

Irasas(int id, String vardas, int amzius) {
		setValues(id, vardas, amzius);
	}

Irasas(String s) {
		StringTokenizer st = new StringTokenizer(s);
		setValues(Integer.parseInt(st.nextToken()), st.nextToken(), Integer.parseInt(st.nextToken()));
	}

public void setValues(int id, String vardas, int amzius) {
		this.id = id;
		this.vardas = vardas;
		this.amzius = amzius;
	}

public String toString() {
		return "" + id + " " + vardas + " " + amzius;
	}

public int compareTo(Irasas kitas) {
		return 	this.vardas.compareTo(kitas.vardas);
	}
}

class D5 {

E1.java

E2.java

G1.java

G2.java

G3.java

G4.java

G5.java

G6.java

G7.java

G8.java

G9.java

Genealogy.java

import java.util.Vector;
class Person {
	String name;
	boolean male;
	boolean alive;
	Vector<Person> siblings = new Vector<Person>();
	Vector<Person> parents = new Vector<Person>();
	Vector<Person> children = new Vector<Person>();
	Person spouse;
	
	Person(String name,	boolean male, boolean alive) {
		this.name = name;
		this.male = male;
		this.alive = alive;
	}
	
	public String toString() {
		return this.name + " " + this.male + " " + this.alive;
	}
	
	Vector<Person> getGrandParents() {
		Vector<Person> grand = new Vector<Person>();
		for(int i=0; i<this.parents.size(); i++) {
			Vector<Person> p = this.parents.get(i).parents;
			for(int j=0; i<p.size(); i++) {
				grand.add(p.get(j));
			}
		}
		return grand;
	}
}

public class Genealogy {

public static void main(String[] args) {
		Person p = new Person("Jonas", true, true);
		System.out.println(p);
		Person pp = new Person("Petras", true, true);
		p.children.add(pp);
		pp.parents.add(p);
		Person pm = new Person("Ona", false, true);
		p.parents.add(pm);
		pm.children.add(p);
		
		System.out.println(pp.getGrandParents().size());
		
	}

}

Gui.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Gui implements ActionListener {

JFrame w;
	JTextField tf;
	JLabel jl;
	
	Gui() {
		w = new JFrame();
		w.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
		FlowLayout fl = new FlowLayout();
		w.setLayout(fl);

tf = new JTextField();
		tf.setColumns(30);

JButton b = new JButton("Nespausk šio mygtuko");
		b.addActionListener(this);
		
		jl = new JLabel("Čia bus rezultatas");
		
		
		w.add(tf);
		w.add(b);
		w.add(jl);

w.setSize(500, 200);
		w.setLocation(100, 200);
		w.setVisible(true);				
	}
	
	
	public static void main(String[] args) {
		new Gui();
	}

@Override
	public void actionPerformed(ActionEvent arg0) {
		String s = tf.getText();
		String sMas[] = s.split(" ");
		int m[] = new int[sMas.length];
		for(int i=0; i<m.length; i++)
			m[i] = Integer.parseInt(sMas[i]);
		
		int max = m[0];
		for(int i=1; i<m.length; i++) {
			if(m[i] > max) {
					max = m[i];
			}		
		}
		
		jl.setText(""+max);
		//w.setLocation((int)(Math.random()*500), (int)(Math.random()*500));
	}
	
}

H1.java

H2.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class H2 extends JFrame implements ActionListener {

public H2() {
         setSize(new Dimension(300, 200));
	     this.setLayout ( new BorderLayout() );

JTextField pi =  new JTextField("");
	     this.add(pi, BorderLayout.NORTH); 
	 
	 	 JPanel mygPanel = new JPanel();
	 	 mygPanel.setLayout( new GridLayout(4, 4));
	 	 
	 	 String[] vard = {  "1", "2", "3", "+", 
	 	 					"4", "5", "6", "-", 
	 	 					"7", "8", "9", "*", 
	 	 					"0", "C", "=", "/"};

JButton[] mygtukai = new JButton[16];
	 	 for(int i=0; i<16; i++) {
	 	 	mygtukai[i] = new JButton(vard[i]);
			mygtukai[i].addActionListener(this);
	 	 	mygPanel.add(mygtukai[i]);
	 	 }
	 	 this.add(mygPanel, BorderLayout.CENTER);
    }

public void actionPerformed(ActionEvent e) {
          System.out.println( ((JButton)e.getSource()).getText() );  
    }
    
    public static void main(String[] args) {
        H2 frame = new H2();
        frame.setVisible(true);
    }
}

H3.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class H3 extends JFrame implements ActionListener {

public H3() {
         setSize(new Dimension(300, 200));
	     this.setLayout ( new BorderLayout() );

this.addWindowListener
         (
            new WindowAdapter() {
                public void windowClosing(WindowEvent e) {
                    H3.this.windowClosed();
                }
            }
		 );            
    }

protected void windowClosed() {
        System.exit(0);
    }

public void actionPerformed(ActionEvent e) {
          System.out.println( ((JButton)e.getSource()).getText() );  
    }
    
    public static void main(String[] args) {
        H3 frame = new H3();
        frame.setVisible(true);
    }
}

H4.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class H4 extends JFrame implements ActionListener{
    
    String skaicius="";
    
    JTextField pi;

public H4() {
        
         setSize(new Dimension(300, 200));

this.setLayout ( new BorderLayout() );

pi =  new  JTextField("");
	     this.add (pi, BorderLayout.NORTH); 
	 
	 	 JPanel mygPanel = new JPanel();
	 	 mygPanel.setLayout( new GridLayout(4, 4));
	 	 
	 	 JButton[] mygtukai = new JButton[16];
	 	 
	 	 String[] vard = {  "1", "2", "3", "+", 
	 	 					"4", "5", "6", "-", 
	 	 					"7", "8", "9", "*", 
	 	 					"0", "C", "=", "/"};
	 	 
	 	 for(int i=0; i<16; i++) {
	 	 	mygtukai[i] = new JButton(vard[i]);
			mygtukai[i].addActionListener(this);
	 	 	mygPanel.add(mygtukai[i]);
	 	 }
	 	 
	 	 this.add(mygPanel, BorderLayout.CENTER);
            
        // Add window listener.
        this.addWindowListener
        (
            new WindowAdapter() {
                public void windowClosing(WindowEvent e) {
                    H4.this.windowClosed();
                }
            }
		);

}
    
    /**
     * Shutdown procedure when run as an application.
     */
    protected void windowClosed() {
        // Exit application.
        System.exit(0);
    }

public void actionPerformed(ActionEvent e) {
    	  JButton b = (JButton)e.getSource();
    	  String uzrasas = b.getText();
    	  char simb = uzrasas.charAt(0);
    	  if(simb >= '0' && simb <= '9')	
    	  	skaicius += simb;
          else {
          	System.out.println( skaicius );
          }	
    }
    
    public static void main(String[] args) {
    	
        // Create application frame.
        H4 frame = new H4();
        
        // Show frame.
        frame.setVisible(true);
    }
}

Labirintas.java

package labirintas;

public class Labirintas {

static String[] lab = {
        "MMMMMMMMMMMMM",
        "M    *M     M",
        "M  MMMM MMM M",
        "          M M",
        "MMMMMMMMMMM M",
        "M           M",
        "MMMMMMM MMMMM",};

static int[][] lb;
    static int ix, iy, z;

public static void main(String[] args) {
        transfer();
        forward();
        backward();
        print();
    }

static boolean test(int x, int y) {
        if (lb[x][y] == 0) {
            lb[x][y] = z + 1;
            if (x == 0 || y == 0
                    || x == lab.length - 1 || y == lab[x].length() - 1) {
                ix = x;
                iy = y;
                return true;
            }
        }
        return false;
    }

static void transfer() {
        lb = new int[lab.length][lab[0].length()];
        for (int i = 0; i < lab.length; i++) {
            for (int j = 0; j < lab[i].length(); j++) {
                if (lab[i].charAt(j) == 'M') {
                    lb[i][j] = -1;
                } else if (lab[i].charAt(j) == ' ') {
                    lb[i][j] = 0;
                } else {
                    lb[i][j] = 1;
                }
            }
        }
    }

static void forward() {
        boolean stop = false;
        for (z = 1; !stop; z++) {
            for (int i = 1; i < lab.length - 1; i++) {
                for (int j = 1; j < lab[i].length() - 1; j++) {
                    if (lb[i][j] == z) {
                        stop = stop || test(i - 1, j) || test(i, j - 1)
                                || test(i + 1, j) || test(i, j + 1);
                    }
                }
            }
        }
    }

static void backward() {
        for (z--; z > 0; z--) {
            lb[ix][iy] = -2;
            if (ix > 0 && lb[ix - 1][iy] == z) {
                ix--;
            } else if (iy > 0 && lb[ix][iy - 1] == z) {
                iy--;
            } else if (ix < lab.length - 1 && lb[ix + 1][iy] == z) {
                ix++;
            } else if (iy < lab[ix].length() - 1 && lb[ix][iy + 1] == z) {
                iy++;
            }
        }
    }

static void print() {
        for (int i = 0; i < lab.length; i++) {
            for (int j = 0; j < lab[i].length(); j++) {
//                System.out.print(lb[i][j] + " ");
                if (lb[i][j] == -1) {
                    System.out.print("M");
                } else if (lb[i][j] == -2) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
        System.out.println(ix + " " + iy);
    }
}

StackQueue.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class StackQueue implements ActionListener {

JFrame w;
	JTextField tf;
	JLabel jl;
	
	StackQueue() {
		w = new JFrame();
		w.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
		FlowLayout fl = new FlowLayout();
		w.setLayout(fl);

tf = new JTextField();
		tf.setColumns(30);

JButton b = new JButton("Analyse");
		b.addActionListener(this);
		
		jl = new JLabel("Result");
		
		
		w.add(tf);
		w.add(b);
		w.add(jl);

w.setSize(500, 200);
		w.setLocation(100, 200);
		w.setVisible(true);				
	}
	
	
	public static void main(String[] args) {
		new StackQueue();
	}

@Override
	public void actionPerformed(ActionEvent arg0) {
		String s = tf.getText();
		String sMas[] = s.split(" ");
		
                String result = "";
                
                Stack stack = new Stack(sMas.length);
                Queue queue = new Queue(sMas.length);

for(int command = 0; command < sMas.length; command++) {
                    if(sMas[command].equals("push")) {
                        command++;
                        int v = Integer.parseInt(sMas[command]);
                        stack.push(v);
                    }
                    if(sMas[command].equals("pop")) {
                        result += stack.pop() + " ";
                    }

if(sMas[command].equals("en")) {
                        command++;
                        int v = Integer.parseInt(sMas[command]);
                        queue.enqueue(v);
                    }
                    if(sMas[command].equals("de")) {
                        result += queue.dequeue() + " ";
                    }
                }
                
		jl.setText(result);
	}
	
}

class Stack {
    int[] stack;
    int pointer;
    
    Stack(int size) {
        stack = new int[size];
        pointer = -1;
    }
            
    void push(int value) {
        pointer++;
        stack[pointer] = value;
    }

int pop() {
        return stack[pointer--];
    }
}

class Queue {
    int[] queue;
    int sPointer;
    int ePointer;
    
    Queue(int size) {
        queue = new int[size];
        sPointer = 0;
        ePointer = -1;
    }
            
    void enqueue(int value) {
        ePointer++;
        queue[ePointer] = value;
    }

int dequeue() {
        return queue[sPointer++];
    }
}

Star.java

import java.awt.*;
import javax.swing.*;

class Star extends JComponent {
	
  int NM = 16;
  int RADIUS = 100;

public void setNM(int nm) {
    this.NM = nm;	
  }

public void repaint(){
	  this.getGraphics().clearRect(0,0,200,200);
	  paint(this.getGraphics());	
  }	
	
  public void paint(Graphics g) {
    for (double angle = 0; angle < Math.PI; angle = angle + 2 * Math.PI / NM ) {
      double x1 = Math.cos(angle) * RADIUS + RADIUS;
      double y1 = Math.sin(angle) * RADIUS + RADIUS;
      double x2 = Math.cos(angle + Math.PI) * RADIUS + RADIUS;
      double y2 = Math.sin(angle + Math.PI) * RADIUS + RADIUS;
      g.drawLine((int)x1, (int)y1, (int)x2, (int)y2);
    }
  }

public Dimension getMinimumSize() {
    return new Dimension(2 * RADIUS, 2 * RADIUS);
  }

public Dimension getPreferredSize() {
    return new Dimension(2 * RADIUS, 2 * RADIUS);
  }
  
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Star star = new Star();
    frame.add(star);
    frame.pack();
    frame.setVisible(true);
  }
  
}

Star2.java

import java.awt.*;
import javax.swing.*;

class Star extends JComponent {
	
  int NM = 16;
  int RADIUS = 300;
  int SIZE = 800;

public void setNM(int nm) {
    this.NM = nm;	
  }

public void repaint(){
	  this.getGraphics().clearRect(0,0,this.getSize().width, this.getSize().height);
	  paint(this.getGraphics());	
  }

public void paint(Graphics g) {
  	int cx = this.getSize().width / 2;
  	int cy = this.getSize().height / 2;
  	double x1=0, y1=0, x2=0, y2=0;
  	double delta = 2 * Math.PI / 5 * 3;
  	double angle = 0;
  	do {
  	  x2 = x1;
  	  y2 = y1;	
      x1 = RADIUS * Math.cos(angle) + cx;
      y1 = RADIUS * Math.sin(angle) + cy;
      if (angle > 0)
      	g.drawLine((int)x1, (int)y1, (int)x2, (int)y2);
      angle += delta;
    } while(angle <= 100 * Math.PI);
  }

public Dimension getMinimumSize() {
    return new Dimension(SIZE, SIZE);
  }

public Dimension getPreferredSize() {
    return new Dimension(SIZE, SIZE);
  }
  
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setSize(900, 900);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLayout(new BorderLayout());

Star star = new Star();
    frame.add(star, BorderLayout.CENTER);

frame.setVisible(true);
  }
  
}

Star3.java

import java.awt.*;
import javax.swing.*;

class Star extends JComponent {
	
  int NM = 16;
  int RADIUS = 300;
  int SIZE = 800;

public void setNM(int nm) {
    this.NM = nm;	
  }

public void repaint(){
	  this.getGraphics().clearRect(0,0,this.getSize().width, this.getSize().height);
	  paint(this.getGraphics());	
  }

public double polarFunction(double phi) {
  	return Math.sin(4*phi);
  }

public void paint(Graphics g) {
  	double delta = Math.PI / 200 + 0.5;
  	int cx = this.getSize().width / 2;
  	int cy = this.getSize().height / 2;
  	double x1=0, y1=0, x2=0, y2=0;
  	double angle = 0;
  	do {
  	  x2 = x1;
  	  y2 = y1;	
      x1 = polarFunction(angle) * RADIUS * Math.cos(angle) + cx;
      y1 = polarFunction(angle) * RADIUS * Math.sin(angle) + cy;
      g.setColor(new Color((int)x1%256,(int)x1%256,(int)y1%256));
      if (angle > 0)
      	g.drawLine((int)x1, (int)y1, (int)x2, (int)y2);
      angle += delta;
    } while(angle <= 100 * Math.PI);
  }

public Dimension getMinimumSize() {
    return new Dimension(SIZE, SIZE);
  }

Star star = new Star();
    frame.add(star, BorderLayout.CENTER);

frame.setVisible(true);
  }
  
}

T1.java

T2.java

T3.java

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

class Kartuves extends JFrame implements ActionListener {
 JTextField zodis;
 JTextField raide;
 JLabel gyv;
 JButton pirmoZ, antroZ;
 String spejamasZodis;
 String jauAtspeta;
 int gyvybes = 9;

Kartuves () {
   Container cp = this.getContentPane();
   cp.setLayout(new GridLayout(3,2));
   zodis = new JTextField();
   cp.add(zodis);
   pirmoZ = new JButton("Nustatyti");
   pirmoZ.addActionListener(this);
   cp.add(pirmoZ);
   raide = new JTextField();
   cp.add(raide);
   antroZ = new JButton("Speti");
   antroZ.addActionListener(this);
   antroZ.setEnabled(false);
   cp.add(antroZ);
   cp.add(new JLabel("Gyvybiu:"));
   gyv = new JLabel(""+gyvybes);
   cp.add(gyv);
   
   setSize(new Dimension(200,100));
 }
 public void actionPerformed(ActionEvent e) {
   if (e.getSource() == pirmoZ) {
     paspaustasPirmas();
   }
   else {
     paspaustasAntras();
   }
 }
 
 void paspaustasPirmas(){
   spejamasZodis=zodis.getText();
   jauAtspeta="";
   while(spejamasZodis.length()!=jauAtspeta.length())
     jauAtspeta += "-";
   zodis.setText(jauAtspeta);
   pirmoZ.setEnabled(false);
   antroZ.setEnabled(true);
   zodis.setEditable(false);
 }
 
 void paspaustasAntras(){
   String spejimas = raide.getText();
   if (spejimas.length()>0) {
        char simb = spejimas.charAt(0);
        int vieta = spejamasZodis.indexOf(simb);
		if( vieta == -1 ) {
		  //nerado
		  gyvybes--;
		  gyv.setText(""+gyvybes);
		  if (gyvybes==0) {
		    antroZ.setEnabled(false);
		  }
		}
		else {
	      //rado 'vieta' vietoje
		  StringBuffer sb = new StringBuffer(jauAtspeta);
		  sb.setCharAt(vieta, simb);
		  while ((vieta = spejamasZodis.indexOf(simb, vieta+1)) != -1)
			  sb.setCharAt(vieta, simb);
		  jauAtspeta =  new String(sb); 
		  zodis.setText( jauAtspeta );
		  
		  if (jauAtspeta.compareTo(spejamasZodis) == 0 ) {
		    antroZ.setEnabled(false);
			JOptionPane.showMessageDialog(null, 
		  		"Pasiseke",
				"Labai pasiseke", 
				JOptionPane.ERROR_MESSAGE);
		  }  
		  
		}
   }
 }
 
 public static void main(String arg[]) {
   Kartuves programa = new Kartuves();
   programa.show();
 }

}

Java

A1.java

A2.java

A3.java

A4.java

B1.java

B1A.java

B2.java

B3.java

BX.java

C1.java

C2.java

CX.java

D.txt

D1.java

D2.java

D3.java

D4.java

D5.java

E1.java

E2.java

G1.java

G2.java

G3.java

G4.java

G5.java

G6.java

G7.java

G8.java

G9.java

Genealogy.java

Gui.java

H1.java

H2.java

H3.java

H4.java

Labirintas.java

StackQueue.java

Star.java

Star2.java

Star3.java

T1.java

T2.java

T3.java

XADT.java