pawn move

src/ChessBoardGUI.java

@@ -21,7 +21,8 @@ public class ChessBoardGUI extends JPanel {
 
     public ChessBoardGUI(JPanel removedPiecePanel){
         super();
-        this.removedPiecePanel=removedPiecePanel;
+
+     this.removedPiecePanel=removedPiecePanel;
 
 //        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setSize(800,600);

src/Pawn.java

 public class Pawn extends Piece{
         private boolean once, end ;
 
-        public Pawn(Cell cell, PieceColor pieceColor) {
-                super(cell, pieceColor) ;
+        public Pawn(Cell cell, PieceColor color) {
+                super(cell, color) ;
                 this.once = true ;
                 this.end = false ;
         }
@@ -18,18 +18,22 @@ public class Pawn extends Piece{
         @Override
         public boolean isValidMove(Cell c, Cell board[][], Piece pw[], Piece pb[]) {
                 if (super.isDeleted()) return false ;
-                if (super.getPieceColor()== PieceColor.BLACK && super.getCell().getRow()==0) end = true ;
-                if (super.getPieceColor()== PieceColor.WHITE && super.getCell().getRow()==7) end = true ;
+                if (super.getPieceColor()==PieceColor.BLACK && super.getCell().getRow()==0) end = true ;
+                if (super.getPieceColor()==PieceColor.WHITE && super.getCell().getRow()==7) end = true ;
 
                 int sw=0 ;
                 if (super.getPieceColor() == PieceColor.BLACK) {
                         for (Piece p:pw) {
-                                if (!p.isDeleted() && p.getCell().getRow()==c.getRow() && p.getCell().getCol()==c.getCol()) sw=1 ;
+                                if (!p.isDeleted() && p.getCell().getRow()==c.getRow() && p.getCell().getCol()==c.getCol()
+                                        && c.getRow()-this.getCell().getRow()==-1
+                                        && Math.abs(this.getCell().getCol()-c.getCol())==1) sw=1 ;
                         }
                 }
                 else {
                         for (Piece p:pb) {
-                                if (!p.isDeleted() && p.getCell().getRow()==c.getRow() && p.getCell().getCol()==c.getCol()) sw=1 ;
+                                if (!p.isDeleted() && p.getCell().getRow()==c.getRow() && p.getCell().getCol()==c.getCol()
+                                        && c.getRow()-this.getCell().getRow()==1
+                                        && Math.abs(this.getCell().getCol()-c.getCol())==1) sw=1 ;
                         }
                 }
 
@@ -55,13 +59,13 @@ public class Pawn extends Piece{
                         }
                         else {
                                 if(
-                                        (this.getCell().getCol() == c.getCol() &&
-                                                ((this.getCell().getRow()-c.getRow()==1 && super.getPieceColor()== PieceColor.BLACK) ||
-                                                        (this.getCell().getRow()-c.getRow()==-1 && super.getPieceColor()== PieceColor.WHITE)) )
+                                        (this.getCell().getCol() == c.getCol() && c.isEmpty() &&
+                                                ((this.getCell().getRow()-c.getRow()==1 && super.getPieceColor()==PieceColor.BLACK) ||
+                                                        (this.getCell().getRow()-c.getRow()==-1 && super.getPieceColor()==PieceColor.WHITE)) )
                                                 ||
                                                 (Math.abs(this.getCell().getCol()-c.getCol())==Math.abs(this.getCell().getRow()-c.getRow()) &&
-                                                        ((this.getCell().getRow()-c.getRow()==1 && super.getPieceColor()== PieceColor.BLACK && sw==1) ||
-                                                                (this.getCell().getRow()-c.getRow()==-1 && super.getPieceColor()== PieceColor.WHITE && sw==1)) )
+                                                        ((this.getCell().getRow()-c.getRow()==1 && super.getPieceColor()==PieceColor.BLACK && sw==1) ||
+                                                                (this.getCell().getRow()-c.getRow()==-1 && super.getPieceColor()==PieceColor.WHITE && sw==1)) )
                                         ) return true ;
                                 else return false ;
                         }