package javalang;
public class Outer {
public static class Inner1{}
}
public class Outer {
public static class Inner1{}
public static void main(String[] args) {
System.out.println(Inner1.class);
}
}
class javalang.Outer$Inner1
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1"));
}
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1").getConstructors().length);
}
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1").getConstructors()[0]);
}
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1")
.getConstructors()[0].newInstance();
}
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1")
.getConstructors().length);
}
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1")
.getDeclaredConstructors().length);
}
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1")
.getDeclaredConstructors()[0].newInstance());
}
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1")
.getDeclaredConstructors()[0]);
}
public static void main(String[] args) throws Exception {
System.out.println(Class.forName("javalang.Outer$Inner1")
.getDeclaredConstructors()[0].newInstance(new Outer()));
}
javalang.Outer$Inner1@ca0b6
public class AccessingObject {
public static void main(String[] args) {
Date date = new Date();
}
// 获得 date 对象一小时后的时间
private static void anHourLater() {
// 这里如何获得 main() 方法中的 date 变量?
}
}
public class AccessingObject {
public static void main(String[] args) {
Date date = new Date();
anHourLater(date);
}
// 获得 date 对象一小时后的时间
private static void anHourLater(Date d) {
Date anHourLater = new Date(d.getTime() + 3600000);
}
}
public class AccessingObject {
private static Date date;
public static void main(String[] args) {
date = new Date();
anHourLater();
}
// 获得 date 对象一小时后的时间
private static void anHourLater() {
Date anHourLater = new Date(date.getTime() + 3600000);
}
}
public class AccessingObject {
public static void main(String[] args) {
DateHolder.date = new Date();
}
// 获得 date 对象一小时后的时间
private static void anHourLater() {
Date anHourLater = new Date(DateHolder.date.getTime() + 3600000);
}
}
class DateHolder {
public static Date date;
}
public class AccessingObject {
public static void main(String[] args) {
Date date = new Date();
Date anHourLater = anHourLater(date);
}
// 获得 date 对象一小时后的时间
private static Date anHourLater(Date d) {
return new Date(d.getTime() + 3600000);
}
}
public class AccessingObject {
public static void main(String[] args) {
Date date = new Date();
anHourLater(date);
}
// 获得 date 对象一小时后的时间
private static void anHourLater(Date d) {
d.setTime(d.getTime() + 3600000);
}
}
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