Package org.optaplanner.examples.nqueens.domain

Examples of org.optaplanner.examples.nqueens.domain.Queen

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        int n = nQueens.getN();
        List<Queen> queenList = nQueens.getQueenList();
        List<Row> rowList = nQueens.getRowList();

        if (n % 2 == 1) {
            Queen a = queenList.get(n - 1);
            scoreDirector.beforeVariableChanged(a, "row");
            a.setRow(rowList.get(n - 1));
            scoreDirector.afterVariableChanged(a, "row");
            n--;
        }
        int halfN = n / 2;
        if (n % 6 != 2) {
            for (int i = 0; i < halfN; i++) {
                Queen a = queenList.get(i);
                scoreDirector.beforeVariableChanged(a, "row");
                a.setRow(rowList.get((2 * i) + 1));
                scoreDirector.afterVariableChanged(a, "row");

                Queen b = queenList.get(halfN + i);
                scoreDirector.beforeVariableChanged(b, "row");
                b.setRow(rowList.get(2 * i));
                scoreDirector.afterVariableChanged(b, "row");
            }
        } else {
            for (int i = 0; i < halfN; i++) {
                Queen a = queenList.get(i);
                scoreDirector.beforeVariableChanged(a, "row");
                a.setRow(rowList.get((halfN + (2 * i) - 1) % n));
                scoreDirector.afterVariableChanged(a, "row");

                Queen b = queenList.get(n - i - 1);
                scoreDirector.beforeVariableChanged(b, "row");
                b.setRow(rowList.get(n - 1 - ((halfN + (2 * i) - 1) % n)));
                scoreDirector.afterVariableChanged(b, "row");
            }
        }

    }
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        List<Queen> queenList = nQueens.getQueenList();

        int score = 0;
        for (int i = 0; i < n; i++) {
            for (int j = i + 1; j < n; j++) {
                Queen leftQueen = queenList.get(i);
                Queen rightQueen = queenList.get(j);
                if (leftQueen.getRow() != null && rightQueen.getRow() != null) {
                    if (leftQueen.getRowIndex() == rightQueen.getRowIndex()) {
                        score--;
                    }
                    if (leftQueen.getAscendingDiagonalIndex() == rightQueen.getAscendingDiagonalIndex()) {
                        score--;
                    }
                    if (leftQueen.getDescendingDiagonalIndex() == rightQueen.getDescendingDiagonalIndex()) {
                        score--;
                    }
                }
            }
        }
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        }
        List<Queen> queenList = nQueens.getQueenList();
        setLayout(new GridLayout(n, n));
        for (int row = 0; row < n; row++) {
            for (int column = 0; column < n; column++) {
                Queen queen = queenList.get(column);
                if (queen.getColumn().getIndex() != column) {
                    throw new IllegalStateException("The queenList is not in the expected order.");
                }
                String toolTipText = "row " + row + ", column " + column;
                if (queen.getRow() != null && queen.getRow().getIndex() == row) {
                    JButton button = new JButton(new QueenAction(queen));
                    button.setMinimumSize(new Dimension(20, 20));
                    button.setPreferredSize(new Dimension(20, 20));
                    button.setToolTipText(toolTipText);
                    add(button);
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        StringBuilder displayString = new StringBuilder();
        int n = nQueens.getN();
        List<Queen> queenList = nQueens.getQueenList();
        for (int row = 0; row < n; row++) {
            for (int column = 0; column < n; column++) {
                Queen queen = queenList.get(column);
                if (queen.getColumn().getIndex() != column) {
                    throw new IllegalStateException("The queenList is not in the expected order.");
                }
                displayString.append(" ");
                if (queen.getRow() != null && queen.getRow().getIndex() == row) {
                    displayString.append("Q");
                } else {
                    displayString.append("_");
                }
            }
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    private List<Queen> createQueenList(NQueens nQueens) {
        int n = nQueens.getN();
        List<Queen> queenList = new ArrayList<Queen>(n);
        long id = 0;
        for (Column column : nQueens.getColumnList()) {
            Queen queen = new Queen();
            queen.setId(id);
            id++;
            queen.setColumn(column);
            // Notice that we leave the PlanningVariable properties on null
            queenList.add(queen);
        }
        return queenList;
    }
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Related Classes of org.optaplanner.examples.nqueens.domain.Queen

  • org.optaplanner.examples.nqueens.app.NQueensHelloWorld
  • org.optaplanner.examples.nqueens.persistence.NQueensGenerator
  • org.optaplanner.examples.nqueens.solver.score.NQueensEasyScoreCalculator
  • org.optaplanner.examples.nqueens.solver.solution.CheatingNQueensPhaseCommand
  • org.optaplanner.examples.nqueens.swingui.NQueensPanel
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