https://junit.org/junit4/
Download and install
跳到github
练习用 - junit.jar - 下载jar
expect后面接异常类
timtout后面接时间, 符合则为ture
import org.junit.Textpublic class xxx{@Textpublic void xxx(){}@Test (expected = NullPointException)public void testNull() {String s = null;s.length();}@Test (timeOut = 1000)public void testTimeOut() {while(true) {}}}