Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 7? -

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• how avoid arrayindexoutofboundsexception or indexoutofboundsexception? [duplicate] 2 answers

exception in thread "main" java.lang.arrayindexoutofboundsexception: 7?

public static void main(string[] args) {      piece[][] board;     board = new piece[7][7];      // black pawns!create , set on board     pawn bp1 = new pawn("black", true, 0, 6);     board[0][6] = bp1;      pawn bp2 = new pawn("black", true, 1, 6);     board[1][6] = bp2;      pawn bp3 = new pawn("black", true, 2, 6);     board[2][6] = bp3;      pawn bp4 = new pawn("black", true, 3, 6);     board[3][6] = bp4;      pawn bp5 = new pawn("black", true, 4, 6);     board[4][6] = bp5;      pawn bp6 = new pawn("black", true, 5, 6);     board[5][6] = bp6;      pawn bp7 = new pawn("black", true, 6, 6);     board[6][6] = bp7;      pawn bp8 = new pawn("black", true, 7, 6);     board[7][6] = bp8; //line 93??       //white pawns!create , set on board     pawn wp1 = new pawn("white", true, 0, 1);     board[0][1] = wp1;      pawn wp2 = new pawn("white", true, 1, 1);     board[1][1] = wp2;      pawn wp3 = new pawn("white", true, 2, 1);     board[2][1] = wp3;      pawn wp4 = new pawn("white", true, 3, 1);     board[3][1] = wp4;      pawn wp5 = new pawn("white", true, 4, 1);     board[4][1] = wp5;      pawn wp6 = new pawn("white", true, 5, 1);     board[5][1] = wp6;      pawn wp7 = new pawn("white", true, 6, 1);     board[6][1] = wp7;      pawn wp8 = new pawn("white", true, 7, 1);     board[7][1] = wp8;      //black rooks!create , set on board     rook br1 = new rook("black", true, 0, 7);     board[0][7] = br1;      rook br2 = new rook("black", true, 7, 7);     board[7][7] = br2;      //white rooks!create , set on board     rook wr1 = new rook("white", true, 0, 0);     board[0][0] = wr1;      rook wr2 = new rook("white", true, 7, 0);     board[7][0] = wr2;      //black knights!create , set on board     knight bk1 = new knight("black", true, 1, 7);     board[1][7] = bk1;      knight bk2 = new knight("black", true, 6, 7);     board[6][7] = bk2;      //white knights!create , set on board     knight wk1 = new knight("white", true, 1, 0);     board[1][0] = wk1;      knight wk2 = new knight("white", true, 6, 0);     board[6][0] = wk2;      //black bishops!create , set on board     bishop bb1 = new bishop("black", true, 2, 7);     board[2][7] = bb1;      bishop bb2 = new bishop("black", true, 5, 7);     board[5][7] = bb2;      //white bishops!create , set on board     bishop wb1 = new bishop("white", true, 2, 0);     board[2][0] = wb1;      bishop wb2 = new bishop("white", true, 5, 0);     board[5][0] = wb2;      //black king!create , set on board     king bking = new king("black", true, 3, 7);     board[3][7] = bking;      //white king!create , set on board     king wking = new king("white", true, 4, 0);     board[4][0] = wking;      //black queen!create , set on board     queen bqueen = new queen("black", true, 4, 7);     board[4][7] = bqueen;      //white queen!create , set on board     queen wqueen = new queen("white", true, 3, 0);     board[3][0] = wqueen;      } 

i exception when i'm trying run project. there no error in built.

 run:  exception in thread "main" java.lang.arrayindexoutofboundsexception: 7 @ chess.startgame.main(startgame.java:93)  java result: 1  build successful (total time: 0 seconds) 

in java, array indexes range 0 length - 1, in case, 0 through 6. there no index 7. have index 7 both dimensions, declare 2d array length 8 in both dimensions.

board = new piece[8][8];