Binary Literal
Underscore in Numeric Literals
Strings in switch Statement
Type Inference for Generic Instance Creation
try-with-resources
1 Exception Handling Changes
1.1、try-with-resources
try(Resource res = …;…){
work with res
}
Resource实现AutoCloseable接口，会自动调用close()方法
1.2、Suppress Exception
java.lang.Throwable#getSuppressed
1.3、Catching Multiple Exceptions
| catch(FileNotFoundException | UnKnownHostException ex) |
1.4、Easier Exception Handling for Reflectvie Methods
Class.forName(className).getMethod(“main”).invoke(null, new String[] {});
需捕获多个异常
| catch (ClassNotFoundException | NoSuchMethodException |
| IllegalAccessException | InvocationTargetException ex) { … } |
新增ReflectiveOperationException代表全部
catch (ReflectiveOperationException ex) { … }
Support for Dynamic Languages
Java nio Package
Diamond Syntax
Automatic null Handling
Support for Dynamic Languages
2、Working with Files
2.1、Paths、Path
2.2、Reading and Writing Files
Files
Watchable、StandardWatchEventKinds
3、Implementing the equals，hashcode and compareTo method
3.1、Objects.equals、Objects.hashCode、Objects.equals
Comparing Numeric Types
x-other.x // Risk of overflow when x is large and other.x is negative
Integer.compare(x,other.x) // No risk of overflow