この記事では、添加、減算、乗算、分裂、Javaの変換などのマトリックスの実装について説明します。次のように、参照のために共有してください。
Javaの初心者は、将来アルゴリズムを作成するときに使用するツールとしてMatrix予算プログラムを作成します。
public class matrixoperation {public static int [] [] add（int [] [] matrix_a、int [] [] matrix_b）{int row = matrix_a.length; int col = matrix_a [0] .length; int [] [] result = new int [row] [col]; if（row！= matrix_b.length || col！= matrix_b [0] .length）{system.out.println（ "fault"）; } else {for（int i = 0; i <row; i ++）{for（int j = 0; j <col; j ++）{result [i] [j] = matrix_a [i] [j]+matrix_b [i] [j]; }}} return result; } public static int [] [] sub（int [] [] matrix_a、int [] [] matrix_b）{int row = matrix_a.length; int col = matrix_a [0] .length; int [] [] result = new int [row] [col]; if（row！= matrix_b.length || col！= matrix_b [0] .length）{system.out.println（ "fault"）; } else {for（int i = 0; i <row; i ++）{for（int j = 0; j <col; j ++）{result [i] [j] = matrix_a [i] [j] - matrix_b [i] [j]; }}} return result; } public static int [] [] dot（int [] [] matrix_a、int [] [] [] matrix_b）{ /** matrix_a's dimension m* p matrix_b's dimension p* n。 return dimension *m *n */ int row = matrix_a.length; int col = matrix_a [0] .length; int [] [] result = new int [row] [col]; if（col！= matrix_b.length）{system.out.println（ "fault"）; } else {for（int i = 0; i <row; i ++）{for（int j = 0; j <col; j ++）{result [i] [j] = 0; for（int k = 0; k <col; k ++）{result [i] [j]+= matrix_a [i] [k] * matrix_b [k] [j]; }}}} return result; } public static int [] [] dot（int [] [] matrix_a、int b）{int row = matrix_a.length; int col = matrix_a [0] .length; int [] [] result = new int [row] [col]; for（int i = 0; i <row; i ++）{for（int j = 0; j <col; j ++）{result [i] [j] = matrix_a [i] [j] * b; }} return result; } public static int [] [] mul（int [] [] matrix_a、int [] [] matrix_b）{ /** matrix_a's dimension m* n matrix_b's dimension m* n。 return dimension *m *n */ int row = matrix_a.length; int col = matrix_a [0] .length; int [] [] result = new int [row] [col]; if（row！= matrix_b.length || col！= matrix_b [0] .length）{system.out.println（ "fault"）; } else {for（int i = 0; i <row; i ++）{for（int j = 0; j <col; j ++）{result [i] [j] = matrix_a [i] [j] * matrix_b [i] [j]; }} return result; } public static int [] [] transport（int [] [] matrix_a）{int row = matrix_a.length; int col = matrix_a [0] .length; int [] [] result = new int [row] [col]; for（int i = 0; i <row; i ++）{for（int j = 0; j <col; j ++）{result [j] [i] = matrix_a [i] [j]; }} return result; } public static void print（int [] [] matrix）{int row = matrix.length; int col = matrix [0] .length; for（int i = 0; i <row; i ++）{system.out.print（ "["）; for（int j = 0; j <col; j ++）{system.out.print（matrix [i] [j]）; if（j！= col -1）{system.out.print（ "、"）; }} system.out.print（ "]/n"）; }} public static void main（string [] args）{int [] [] a = {{1、2}、{3、4}}; int [] [] b = {{7、8}、{6、5}}; int [] [] c = add（a、b）; system.out.println（ "wulin.comテスト結果は次のとおりです。"）; System.out.println（ "Matrix a ="）;印刷（a）; System.out.println（ "Matrix b ="）;印刷（b）; System.out.println（ "Matrix a + b ="）;印刷（c）; c = sub（a、b）; System.out.println（ "Matrix a -b ="）;印刷（c）; int [] [] d = dot（a、b）; system.out.println（ "マトリックスAドットb ="）;印刷（d）; int [] [] e = dot（a、3）; System.out.println（ "Matrix a * 3 ="）;印刷（e）; int [] [] f = Transport（a）; system.out.println（ "matrix at ="）;印刷（f）; int [] [] g = mul（a、b）; System.out.println（ "Matrix a * b ="）;印刷（g）; }}実行結果：
Javaアルゴリズムの詳細については、このサイトに興味のある読者は、「Javaデータ構造とアルゴリズムのチュートリアル」、「Java操作DOMノードのヒントの要約」、「Javaファイルの要約およびディレクトリ操作のヒント」、「Java Cache操作のヒントの要約」というトピックを見ることができます。
この記事がみんなのJavaプログラミングに役立つことを願っています。