java matrix是什么，讓我們一起了解一下？

Matrix 是一個(gè)基于javaEE技術(shù)集成的基礎(chǔ)應(yīng)用系統(tǒng)，是一個(gè)可以看見(jiàn)和運(yùn)行的系統(tǒng)，matrix定義了一個(gè)穩(wěn)定而有效的設(shè)計(jì)開(kāi)發(fā)框架，結(jié)合代碼生成器使用自動(dòng)生成增刪改查代碼簡(jiǎn)化了應(yīng)用開(kāi)發(fā)過(guò)程。它集成了系統(tǒng)日志，事務(wù)控制、安全校驗(yàn)、權(quán)限管理等功能，為開(kāi)發(fā)人員提供一個(gè)能夠快速開(kāi)發(fā)業(yè)務(wù)系統(tǒng)的框架，開(kāi)發(fā)人員只需要專(zhuān)注于業(yè)務(wù)邏輯而不需要關(guān)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(jìn)行位移。

2、setSkew(float kx,float ky)：控制Matrix進(jìn)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(jìn)行傾斜，kx、ky為X、Y方向上的傾斜比例。

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

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

6、setScale(float sx,float sy)：設(shè)置Matrix進(jìn)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(shè)置Matrix以(px,py)為軸心進(jìn)行縮放，sx、sy為X、Y方向上的縮放比例。

matrix的入門(mén)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(chuàng)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(shè)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(shè)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(zhuǎn)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(jī)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(jī)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(chǎn)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。