态
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：
"线程中的异常" main" java.util.unknownformatConversionException：conversion ='n'"
因此，如果您替换了以下代码：
System.out.printf("%nNumber of object created until now is : %d", PackageData.count);
输出将在新线路上：
Number of object created until now is : 1
检查此讨论：Java的"％n n＆quot"是怎么回事。在printf？
中