tank/src/test/java/CommonTest.java

import com.msb.enums.DirEnum;
import org.junit.Assert;
import org.junit.Test;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Random;

/**
 * @Author bingor
 * @Date 2022-10-01 10:48
 * @Description: com.msb.test
 * @Version: 1.0
 */
public class CommonTest {

    @Test
    public void testReadImage() throws IOException {
        BufferedImage bufferedImage = ImageIO.read(new File("E:\\myfile\\msb_马士兵教育体系\\课程下载的资源\\MCA高级构架师\\73-坦克大战（一期）\\images\\tankD.gif"));
        Assert.assertNotNull(bufferedImage);
        BufferedImage image = ImageIO.read(CommonTest.class.getClassLoader().getResourceAsStream("images/tankD.gif"));
        Assert.assertNotNull(image);
    }

    @Test
    public void testEnum() {
        Random random = new Random();
        System.out.println(DirEnum.valueOf(random.nextInt(3)));
        System.out.println(DirEnum.valueOf(random.nextInt(3)));
        System.out.println(DirEnum.valueOf(random.nextInt(3)));
        System.out.println(DirEnum.valueOf(random.nextInt(3)));
    }

    @Test
    public void testCommon() {
       boolean bool = xh();
        System.out.println(bool);
    }

    public boolean xh() {
        int [] indexs = {1, 2, 3, 4, 5, 6, 7, 8, 9 };
        for (int index : indexs) {
            if(index == 5) return false;
            System.out.println(index);
        }
        return true;
    }

    @Test
    public void testString() {
        String s1 = "abc";
        String s2 = "abc";
        String s3 = new String("abc");
        String s4 = new String("abc");

        System.out.println(s1 == s2);   //true, 因为都是从字符串常量池取出的,指向的是同一个对象
        System.out.println(s1 == s3);   //false 因为两个对象地址不一样
        System.out.println(s3 == s4);   //false 因为两个对象地址不一样
        System.out.println(s3.intern() == s1);  //true  s3.intern() 指的是该地址指向内部指向常量池的对象
        System.out.println(s3.intern() == s4.intern()); //true
    }

}