这是我的代码:
package com.example.java;
public class PackageDataTest {
public static void main(String[] args) {
PackageData data1 = new PackageData("John Davids");
System.out.printf("%Number of object created until now is : %d", PackageData.count);
}
}
class PackageData {
static int count = 0;
String name;
public PackageData(){
this.name = "";
++count;
}
public PackageData(String name) {
this.name = name;
++count;
}
public int getCount() { return count; }
}
我不断收到以下错误:
“线程“主”java.util.UnknownFormatConversionException 中的异常:转换 = 'N'”