java matrix是什么，讓我們一起了解一下？

Matrix 是一個基于javaEE技術集成的基礎應用系統，是一個可以看見和運行的系統，matrix定義了一個穩定而有效的設計開發框架，結合代碼生成器使用自動生成增刪改查代碼簡化了應用開發過程。它集成了系統日志，事務控制、安全校驗、權限管理等功能，為開發人員提供一個能夠快速開發業務系統的框架，開發人員只需要專注于業務邏輯而不需要關注非功能需求。

那么Matrix有哪些方法可以控制圖片變換？

1、setTranslate(float dx,float dy)：控制Matrix進行位移。

2、setSkew(float kx,float ky)：控制Matrix進行傾斜，kx、ky為X、Y方向上的比例。

3、setSkew(float kx,float ky,float px,float py)：控制Matrix以px、py為軸心進行傾斜，kx、ky為X、Y方向上的傾斜比例。

4、setRotate(float degrees)：控制Matrix進行depress角度的旋轉，軸心為（0,0）。

5、setRotate(float degrees,float px,float py)：控制Matrix進行depress角度的旋轉，軸心為(px,py)。

6、setScale(float sx,float sy)：設置Matrix進行縮放，sx、sy為X、Y方向上的縮放比例。

7、setScale(float sx,float sy,float px,float py)：設置Matrix以(px,py)為軸心進行縮放，sx、sy為X、Y方向上的縮放比例。

matrix的入門操作代碼如下：

import?org.junit.Test;
import?org.ujmp.core.DenseMatrix;
import?org.ujmp.core.Matrix;
/**
?*?Created?by?lionel?on?16/11/29.
?*/
public?class?MatrixTest?{
????@Test
????public?void?test()?{
????????//創建4*4的?零矩陣
????????Matrix?dense?=?DenseMatrix.Factory.zeros(4,?4);
????????System.out.println(dense);
????????/*
????????0.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????0.0000?????0.0000?????0.0000
????????*/
????????//設置矩陣dense第三行第四列的元素為5.0
????????dense.setAsDouble(5.0,?2,?3);
????????//其他設置
????????dense.setAsDouble(1.0,?0,?0);
????????dense.setAsDouble(3.0,?1,?1);
????????dense.setAsDouble(4.0,?2,?2);
????????dense.setAsDouble(-2.0,?3,?3);
????????dense.setAsDouble(-2.0,?1,?3);
????????System.out.println(dense);
????????/*
????????1.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????3.0000?????0.0000????-2.0000
????????0.0000?????0.0000?????4.0000?????5.0000
????????0.0000?????0.0000?????0.0000????-2.0000
????????*/
????????//矩陣dense的轉置
????????Matrix?transpose?=?dense.transpose();
????????System.out.println(transpose);
????????/*
????????1.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????3.0000?????0.0000?????0.0000
????????0.0000?????0.0000?????4.0000?????0.0000
????????0.0000????-2.0000?????5.0000????-2.0000
????????*/
????????//矩陣dense與矩陣transpose相加
????????System.out.println(dense.plus(transpose));
????????/*
????????2.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????6.0000?????0.0000????-2.0000
????????0.0000?????0.0000?????8.0000?????5.0000
????????0.0000????-2.0000?????5.0000????-4.0000
?????????*/
????????//矩陣dense與矩陣transpose相減
????????System.out.println(dense.minus(transpose));
????????/*
????????0.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????0.0000?????0.0000????-2.0000
????????0.0000?????0.0000?????0.0000?????5.0000
????????0.0000?????2.0000????-5.0000?????0.0000
????????*/
????????//矩陣dense與矩陣transpose相乘
????????Matrix?matrixProduct?=?dense.mtimes(transpose);
????????System.out.println(matrixProduct);
????????/*
????????1.0000?????0.0000?????0.0000?????0.0000
????????0.0000????13.0000???-10.0000?????4.0000
????????0.0000???-10.0000????41.0000???-10.0000
????????0.0000?????4.0000???-10.0000?????4.0000
????????*/
????????//矩陣dense?所有元素*2
????????Matrix?scaled?=?dense.times(2);
????????System.out.println(scaled);
????????/*
????????2.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????6.0000?????0.0000????-4.0000
????????0.0000?????0.0000?????8.0000????10.0000
????????0.0000?????0.0000?????0.0000????-4.0000
?????????*/
????????//矩陣?dense?的逆矩陣
????????System.out.println(dense.inv());
????????/*
????????1.0000?????0.0000?????0.0000?????0.0000
????????0.0000?????0.3333?????0.0000????-0.3333
????????0.0000?????0.0000?????0.2500?????0.6250
???????-0.0000????-0.0000????-0.0000????-0.5000
?????????*/
????????//生成4*4隨機矩陣,元素值在0，1之間
????????Matrix?rand?=?Matrix.Factory.rand(4,?4);
????????System.out.println(rand);
????????/*
????????0.5478?????0.5100?????0.7078?????0.0600
????????0.8316?????0.4039?????0.2553?????0.0173
????????0.4354?????0.7132?????0.7865?????0.7006
????????0.0394?????0.4839?????0.4374?????0.6241
?????????*/
????????//生成4*4隨機矩陣,元素值在-1，1之間
????????Matrix?randn?=?Matrix.Factory.randn(4,?4);
????????System.out.println(randn);
????????/*
????????0.8655?????0.6231????-0.4234?????0.0802
????????0.7217????-0.7399????-0.5692?????0.6421
????????-1.5557?????0.4745?????2.1110?????1.5489
????????-0.8520????-0.7722?????0.9025????-0.4664
????????*/
????????//產生2*3?元素值都為1.0000的矩陣
????????Matrix?ones?=?Matrix.Factory.ones(2,?3);
????????System.out.println(ones);
????????/*
????????1.0000?????1.0000?????1.0000
????????1.0000?????1.0000?????1.0000
?????????*/
????}
}

以上就是小編今天的分享了，希望可以幫助到大家。