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Java example source code file (NonPositiveDefiniteMatrixException.java)

This example Java source code file (NonPositiveDefiniteMatrixException.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

exceptioncontext, nonpositivedefinitematrixexception, numberistoosmallexception

The NonPositiveDefiniteMatrixException.java Java example source code

 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *      http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.commons.math3.linear;

import org.apache.commons.math3.exception.NumberIsTooSmallException;
import org.apache.commons.math3.exception.util.LocalizedFormats;
import org.apache.commons.math3.exception.util.ExceptionContext;

 * Exception to be thrown when a positive definite matrix is expected.
 * @since 3.0
public class NonPositiveDefiniteMatrixException extends NumberIsTooSmallException {
    /** Serializable version Id. */
    private static final long serialVersionUID = 1641613838113738061L;
    /** Index (diagonal element). */
    private final int index;
    /** Threshold. */
    private final double threshold;

     * Construct an exception.
     * @param wrong Value that fails the positivity check.
     * @param index Row (and column) index.
     * @param threshold Absolute positivity threshold.
    public NonPositiveDefiniteMatrixException(double wrong,
                                              int index,
                                              double threshold) {
        super(wrong, threshold, false);
        this.index = index;
        this.threshold = threshold;

        final ExceptionContext context = getContext();
        context.addMessage(LocalizedFormats.ARRAY_ELEMENT, wrong, index);

     * @return the row index.
    public int getRow() {
        return index;
     * @return the column index.
    public int getColumn() {
        return index;
     * @return the absolute positivity threshold.
    public double getThreshold() {
        return threshold;

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