Java 当我没有';我没有主要的方法
我正在我的学院学习java课程,我们正在使用一个名为acm的库。但是当我们编写代码时,我们并不创建main方法。“public void run(){}”充当主方法。请解释一下 举个例子,我创建了一个程序Java 当我没有';我没有主要的方法,java,main,acm-java-libraries,Java,Main,Acm Java Libraries,我正在我的学院学习java课程,我们正在使用一个名为acm的库。但是当我们编写代码时,我们并不创建main方法。“public void run(){}”充当主方法。请解释一下 举个例子,我创建了一个程序 import acm.program.ConsoleProgram; import acm.util.RandomGenerator; public class Assignment3 extends ConsoleProgram { private static final lo
import acm.program.ConsoleProgram;
import acm.util.RandomGenerator;
public class Assignment3 extends ConsoleProgram {
private static final long serialVersionUID = 1L;
private RandomGenerator rgen = RandomGenerator.getInstance();
public void run() {
final int QUESTION_AMOUNT = 5;
println("Welcome to the Math Quiz! You have " + QUESTION_AMOUNT + " questions to answer! Good luck!");
for (int i = 0; i < QUESTION_AMOUNT; i++) {
askQuestion();
}
println("End of the quiz!");
}
public void askQuestion() {
int num1, num2, kidanswer, realanswer;
String operation = "";
boolean x = rgen.nextBoolean();
if (x == true) {
operation = "+";
} else {
operation = "-";
}
if (operation == "-") {
num1 = rgen.nextInt(0, 20);
num2 = rgen.nextInt(0, num1);
} else {
num1 = rgen.nextInt(0, 20);
num2 = rgen.nextInt(0, 20 - num1);
}
String question = ("What is " + num1 + " " + operation + " " + num2 + " = ");
if (operation == "-") {
realanswer = num1 - num2;
} else {
realanswer = num1 + num2;
}
kidanswer = readInt(question);
int i = 0;
while (i < 2) {
if (kidanswer == realanswer) {
println("That is correct! Well done!");
break;
} else {
kidanswer = readInt("Wrong answer. Please try another answer: ");
i++;
if (i == 2) {
if (kidanswer == realanswer) {
println("That is correct! Well done!");
} else {
println("Sorry :( Out of tries! The answer was: " + realanswer);
}
}
}
}
}
}
导入acm.program.ConsoleProgram;
导入acm.util.RandomGenerator;
公共类分配3扩展控制台程序{
私有静态最终长serialVersionUID=1L;
private RandomGenerator rgen=RandomGenerator.getInstance();
公开募捐{
最后的整数问题金额=5;
println(“欢迎参加数学测验!你有“+问题数量+”的问题要回答!祝你好运!”);
对于(int i=0;i
有些东西必须提供一个主方法。在你的例子中,几乎可以肯定的是你的类扩展的ACM东西(ConsoleProgram
),在某个时候,它将调用你的运行
方法。有些东西必须提供一个主方法。在你的例子中,几乎可以肯定的是ACM东西(ConsoleProgram
),您的类将扩展它,并在某个时候调用您的run
方法。因为:
Assignment3扩展控制台程序
Assignment3扩展控制台程序
- 因为: