package com.zs.container;
import java.util.ArrayList;
import com.java.array.generator.CountingGenerator.String;
import com.java.array.generator.CountingGenerator;
import com.java.array.generator.Generator;
public class CollectionData<T> extends ArrayList<T> {
public CollectionData(Generator<T> gen, int quantity) {
for (int i = 0; i < quantity; i++)
add(gen.next());
}
// A generic convenience method:
public static <T> CollectionData<T> list(Generator<T> gen, int quantity) {
return new CollectionData<T>(gen, quantity);
}
public static void main(String[] args) {
System.out.println("start");
Generator<java.lang.String> gen =new CountingGenerator.String();
ArrayList<java.lang.String> list=new CollectionData<java.lang.String>(gen,8);
System.out.println(list);
}
}
错误:类 com. Zs。容器。在CollectionData中找不到main方法,请将main方法定义为: public static void main(String[]args)
出了什么问题?我当然有main方法!为什么会出错呢?
惊讶!当我删除此行 “导入com.java.array.generator.CountingGenerator.String;” 效果很好!为什么???
the com.java.array.generator.CountingGenerator.String code:
package com.java.array.generator;
public class CountingGenerator {
static char[] chars = ("abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ").toCharArray();
public static class Character implements Generator<java.lang.Character> {
int index = -1;
public java.lang.Character next() {
index = (index + 1) % chars.length;
return chars[index];
}
}
public static class String implements Generator<java.lang.String> {
private int length = 7;
Generator<java.lang.Character> cg = new Character();
public String() {
}
public String(int length) {
this.length = length;
}
public java.lang.String next() {
char[] buf = new char[length];
for (int i = 0; i < length; i++)
buf[i] = cg.next();
return new java.lang.String(buf);
}
}
}
最佳答案
使用
public static void main(java.langString[] args)
为什么?因为 String
被解释为
import com.java.array.generator.CountingGenerator.String;
关于java - 在CollectionData中找不到main方法,请将main方法定义为:main,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29326303/