我是Gradle的新手,正在使用Gradle 6.1。我正在编写小型应用程序,以了解Gradle的多项目应用程序和Java库插件的概念。
App.java如何完美运行,而无需从SubProject-2导入DefaultRandomGenerator类
为什么我在父项目(MultiProjectApp)的build.grade文件中收到错误消息“未找到方法调用api的候选对象。”
以下是我的应用程序代码:
rootProject.name = 'MultiProjectApp'
include 'SubProject-1'
include 'SubProject-2'
allprojects {
apply plugin: 'java'
group 'org.example'
version '1.0-SNAPSHOT'
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories {
mavenCentral()
}
}
project(':SubProject-1') {
dependencies {
implementation project(':SubProject-2')
}
}
project(':SubProject-2') {
apply plugin: 'java-library'
dependencies {
api 'org.apache.commons:commons-math3:3.2'
implementation 'org.apache.logging.log4j:log4j-core:2.5'
testImplementation "junit:junit:4.12"
}
}
Empty file
package org.examples;
public interface RandomGenerator {
String name();
int generate();
}
package org.examples;
import org.apache.commons.math3.random.RandomDataGenerator;
public class DefaultRandomGenerator implements RandomGenerator {
public String name() {
return "Main Random Number Generator";
}
public int generate() {
final RandomDataGenerator randomDataGenerator = new RandomDataGenerator();
return randomDataGenerator.nextInt(5, 10);
}
}
Empty file
package org.examples;
import org.apache.commons.math3.random.RandomDataGenerator;
public class App {
public static void main(String[] args) {
RandomGenerator aRandomGenerator = new DefaultRandomGenerator();
System.out.println("The 1st random number is :" + aRandomGenerator.generate());
System.out.println("The 2nd random number is :" + generateMy());
}
public static int generateMy() {
final RandomDataGenerator aRandomDataGenerator = new RandomDataGenerator();
return aRandomDataGenerator.nextInt(5, 10);
}
}