KnightsTour.java~59~
资源名称:Java.rar [点击查看]
上传用户:liming9091
上传日期:2014-10-27
资源大小:3376k
文件大小:12k
源码类别:
Java编程
开发平台:
Java
- package gao;
- import java.awt.*;
- import java.awt.event.*;
- import javax.swing.*;
- import java.awt.image.*;
- public class KnightsTour extends JApplet {
- public static int access[][] = {
- {2,3,4,4,4,4,3,2},
- {3,4,6,6,6,6,4,3},
- {4,6,8,8,8,8,6,4},
- {4,6,8,8,8,8,6,4},
- {4,6,8,8,8,8,6,4},
- {4,6,8,8,8,8,6,4},
- {3,4,6,6,6,6,4,3},
- {2,3,4,4,4,4,3,2}};
- public static int accessbak[][] = arrayCopy ( access ) ;
- // the value indicate the No.value moving
- int countMoving = -1 ;
- int tourXpos [] = new int [ 64 ];
- int tourYpos [] = new int [ 64 ];
- private int recordXpos [][];
- private int recordYpos [][];
- private int recordCount = - 1 ;
- private boolean success = false;
- MyPanel myPanel ;
- public void tour ( int xpos ,int ypos ){
- // int x,y;
- countMoving ++ ;
- //all the 64 squares has been touch , return
- if (countMoving == 63 )
- {
- tourXpos [ countMoving ] = xpos ;
- tourYpos [ countMoving ] = ypos ;
- success = true ;
- countMoving -- ;
- return ;
- }
- AccessibleSquares nextSquare = new AccessibleSquares( xpos, ypos );
- while (nextSquare.hasMoreAccessible())
- {
- // do moving
- nextSquare.domoving();
- //record this moving
- tourXpos [ countMoving ] = xpos ;
- tourYpos [ countMoving ] = ypos ;
- // try the next moving
- nextSquare.nextAccessible();
- tour ( nextSquare.getXpos() , nextSquare.getYpos() );
- //all the 64 squares has been touch , return
- if ( success )
- {
- countMoving -- ;
- return ;
- }
- //this moving try is a faillure, pick it up from the chess board
- nextSquare.undomoving();
- }// end of while
- countMoving -- ;
- }//end of tour method
- public static int[] arrayCopy ( int array1[] )
- {
- int[]array2 = new int [array1.length];
- for ( int row = 0 ; row < array1.length ; row ++ )
- {
- array2 [ row ] = array1 [ row ] ;
- };
- return array2;
- }
- public static int[][] arrayCopy ( int array1[][] )
- {
- int[][] array2 = new int [array1.length][array1[0].length];
- for ( int row = 0 ; row < array1.length ; row ++ )
- {
- for ( int column = 0 ; column < array1[0].length ; column ++ )
- {
- array2 [ row ][ column ] = array1 [ row ][ column ];
- };
- };
- return array2;
- }
- public void initialArray ( int chessBoard[][] )
- {
- for ( int row = 0 ; row < 8 ; row ++ )
- {
- for ( int column = 0 ; column < 8 ; column ++ )
- {
- chessBoard [ row ][ column ] = 0 ;
- };
- };
- }
- /* public static void main( String args[] ) {
- KnightsTour application = new KnightsTour();
- application.tour( 0 , 0 );
- }
- */
- public void init () {
- recordCount = -1 ;
- recordXpos = new int [ 64 ][ 64 ] ;
- recordYpos = new int [ 64 ][ 64 ] ;
- for (int row = 0 ; row < 8 ;row ++){
- for ( int column = 0 ; column < 8 ; column ++ ){
- success = false ;
- countMoving = -1;
- access = arrayCopy ( accessbak );
- tour ( row ,column );
- recordCount ++ ;
- recordXpos [ recordCount ] = arrayCopy ( tourXpos ) ;
- recordYpos [ recordCount ] = arrayCopy ( tourYpos ) ;
- }
- }
- recordCount = -1 ;
- myPanel = new MyPanel( recordXpos [ 0 ] ,recordYpos [ 0 ]) ;
- JPanel buttonPanel = new JPanel();
- JButton nextMoving = new JButton( "Next Moving" );
- JButton nextTour = new JButton( "Next Tour" );
- buttonPanel.add( nextTour );
- buttonPanel.add( nextMoving );
- getContentPane().add( buttonPanel, BorderLayout.SOUTH );
- getContentPane().add( myPanel );
- nextMoving.addActionListener(
- //anonymous inner class
- new ActionListener() {
- public void actionPerformed ( ActionEvent e ) {
- myPanel.showNext() ;
- }
- }
- );//end call to addActionListener
- nextTour.addActionListener(
- //anonymous inner class
- new ActionListener() {
- public void actionPerformed ( ActionEvent e ) {
- if ( recordCount < recordXpos.length - 1 ) {
- recordCount ++ ;
- } else {
- recordCount = 0 ;
- }
- myPanel.initboard ( recordXpos [ recordCount ] , recordYpos [ recordCount ] );
- myPanel.showNext() ;
- }
- }
- );//end call to addActionListener
- }
- public void paint (Graphics g )
- {
- super.paint( g );
- /* success = false ;
- countMoving = -1;
- access = arrayCopy ( accessbak );
- tour ( 7 , 6 );
- for ( int row = 0 ; row < 9 ; row ++ )
- {
- g.drawLine( 10 , 10 + 32 * row , 32 * 8 + 10 , 10 + 32 * row );
- }
- for ( int column = 0 ; column < 9 ; column ++ )
- {
- g.drawLine( 10 + 32 * column , 10 , 10 + 32 * column , 32 * 8 + 10 );
- };
- for ( int count = 0 ; count < tourXpos.length ; count ++ )
- {
- g.drawString("" + count , 26 + 32 * tourXpos[ count ] ,32 + 32 * tourYpos [ count ] );
- };*/
- }
- }//end of class KnightsTour
- class AccessibleSquares {
- private static int horizontal[] = {2,1,-1,-2,-2,-1,1,2};
- private static int vertical [] = {-1,-2,-2,-1,1,2,2,1};
- private int xpos[] ;
- private int ypos[] ;
- private int accessibility [];
- private int ownxpos ,ownypos ;
- private int ownAccessibility ;
- private int arrayPos ;
- private int countAccessibility;
- public AccessibleSquares(int x , int y ){
- int testXPos;
- int testYPos;
- xpos = new int [ 8 ];
- ypos = new int [ 8 ];
- accessibility = new int [ 8 ];
- arrayPos = 0 ;
- ownxpos = x ;
- ownypos = y ;
- ownAccessibility = KnightsTour.access[ x ][ y ];
- for (int i = 0 ; i < horizontal.length ; i++ ){
- testXPos = x + horizontal[ i ];
- testYPos = y + vertical [ i ];
- if ( (testXPos >= 0 ) & ( testXPos < 8 ) &
- (testYPos >= 0 ) & ( testYPos < 8 ) ) {
- xpos [ arrayPos ] = testXPos ;
- ypos [ arrayPos ] = testYPos ;
- accessibility [ arrayPos ] = KnightsTour.access [testXPos][testYPos];
- //because accessibility [ arrayPos ] = 0 indicating the square has been occupied
- if (accessibility [ arrayPos ] > 0 )
- arrayPos ++ ;
- }//end of if
- }// end of for
- countAccessibility = arrayPos ;
- if (countAccessibility > 0 )
- {sortAll();}
- arrayPos = -1 ;
- }// end of constructor
- public boolean hasMoreAccessible(){
- // arrayPos + 1 point to the next accessible
- if ( (arrayPos + 1 ) < countAccessibility ){
- return true;
- }else {
- return false;
- }
- }//end of the hasMoreAccessible()
- public AccessibleSquares nextAccessible(){
- arrayPos ++ ;
- return this;
- }
- public AccessibleSquares accessibleAt( int pos){
- if ((pos >= 0) & (pos < countAccessibility ))
- arrayPos = pos ;
- return this;
- }
- public int getXpos(){
- return xpos[ arrayPos ];
- }
- public int getYpos(){
- return ypos[ arrayPos ];
- }
- public int getAccessibility(){
- return accessibility[ arrayPos ];
- }
- public int getTotalAccessible(){
- return countAccessibility;
- }
- //bubble sorting
- private void sortAll (){
- for ( int begin = 0 ; begin < countAccessibility - 1 ; begin ++ ){
- for ( int i = begin + 1; i < countAccessibility ; i ++ ){
- if ( accessibility [ begin ] > accessibility [ i ] ){
- swapAll( begin, i );
- }//end of if
- }// end of inner for
- }// end of outer for
- }// end of sortAll
- private void swapAll ( int i , int j ){
- int temp ;
- temp = xpos [ i ];
- xpos [ i ] = xpos [ j ];
- xpos [ j ] = temp;
- temp = ypos [ i ];
- ypos [ i ] = ypos [ j ];
- ypos [ j ] = temp;
- temp = accessibility [ i ];
- accessibility [ i ] = accessibility [ j ];
- accessibility [ j ] = temp;
- }
- public void domoving(){
- for ( int i = 0 ; i < countAccessibility ; i ++ ){
- KnightsTour.access[ xpos [i] ][ ypos[i] ] -- ;
- }
- KnightsTour.access[ ownxpos ][ ownypos ] = 0 ;
- }
- public void undomoving(){
- for ( int i = 0 ; i < countAccessibility ; i ++ ){
- KnightsTour.access[ xpos [i] ][ ypos[i] ] ++ ;
- }
- KnightsTour.access[ ownxpos ][ ownypos ] = ownAccessibility ;
- }
- }
- class MyPanel extends JPanel {
- public static final int WHITE = 0 ;
- public static final int BLACK = 1 ;
- public static final int WKNIGHT = 2 ;
- public static final int BKNIGHT = 3 ;
- private int chessboard[][];
- private int xrecord [] ;
- private int yrecord [] ;
- private int displayCount ;
- private int lastxpos ,lastypos ,nextxpos ,nextypos ;
- ImageIcon images[] ;
- private boolean start ;
- public MyPanel() {
- initvariance();
- }
- public MyPanel( int [] newxrecord ,int [] newyrecord ) {
- initvariance();
- initboard( newxrecord , newyrecord );
- }
- public void initvariance () {
- chessboard = new int[ 8 ][ 8 ];
- xrecord = new int [ 64 ] ;
- yrecord = new int [ 64 ];
- images = new ImageIcon [ 4 ];
- images[ 0 ] = new ImageIcon( "white.jpg");
- images[ 1 ] = new ImageIcon( "black.jpg");
- images[ 2 ] = new ImageIcon( "wknight.jpg");
- images[ 3 ] = new ImageIcon( "bknight.jpg");
- }
- public void initboard ( int [] newxrecord ,int [] newyrecord ){
- start = true ;
- displayCount = -1 ;
- for (int row = 0 ; row < 8 ;row ++){
- for ( int column = 0 ; column < 8 ; column ++ ){
- // white use 0 ,black use 1
- chessboard [ row ][ column ] = ( row + column ) % 2 ;
- }
- }//end of outer for
- for ( int row = 0 ; row < newxrecord .length ; row ++ ) {
- xrecord [ row ] = newxrecord [ row ] ;
- yrecord [ row ] = newyrecord [ row ] ;
- }
- displayCount = 0 ;
- chessboard [ xrecord [ displayCount ] ][ yrecord [ displayCount ] ] += 2 ;
- }//end of initboard
- public void showNext() {
- if ( displayCount < xrecord.length - 1 ){
- displayCount ++ ;
- chessboard [ xrecord [ displayCount ] ][ yrecord [ displayCount ] ] += 2 ;
- repaint();
- }
- }
- public void paintComponent ( Graphics g ) {
- for (int row = 0 ; row < 8 ;row ++){
- for ( int column = 0 ; column < 8 ; column ++ ){
- images[ chessboard[ row ][ column ] ].paintIcon( this , g, 40 * row,40 * column );
- }//end of inner for
- }//end of outer for
- if ( displayCount > 0 ){
- lastxpos = xrecord [ displayCount - 1];
- lastypos = yrecord [ displayCount - 1];
- nextxpos = xrecord [ displayCount ];
- nextypos = yrecord [ displayCount ];
- g.setColor( Color.green);
- g.drawRect( 40 * xrecord [ displayCount - 1 ] + 2,40 * yrecord [ displayCount - 1 ] + 2, 36, 36 );
- g.setColor( Color.green);
- g.drawRect( 40 * xrecord [ displayCount ] + 2 ,40 * yrecord [ displayCount ] + 2, 36, 36 );
- g.setColor( Color.blue);
- g.drawRect( 40 * Math.min( nextxpos, lastxpos ),
- 40 * Math.min( nextypos, lastypos ),
- ( Math.abs( nextxpos - lastxpos ) + 1 ) * 40,
- ( Math.abs( nextypos - lastypos ) + 1 ) * 40 );
- }//end of if
- g.setColor( Color.red );
- g.drawRect ( xrecord [ 0 ] + 2, yrecord [ 0 ] + 2, 36, 36 ) ;
- }// end of the method paintComponent
- }