Java高階特性之new一個內部類
阿新 • • 發佈:2018-12-26
package three.day.newcharacter;
class Outer
{
public static final int height = 20;
public static int weight = 20;
private int num = 100;//內建類可以訪問private的,public,protected肯定可以
class Inner //定義內建類
{
class InnerInner
{
void output()
{
System.out.println(Outer.this.num);//無論內部累內建多少內部類,內建有多深始終可以直接使用Outer.this
System.out.println(Inner.this.num);
}
}
private int num = 90;
void output()
{
int num = 80;
InnerInner innerinner = new InnerInner();
innerinner.output();
System.out.println(num);//區域性變數
System.out.println(this.num);//內建類私有成員
System.out.println(Outer.this.num);//引用外部類中的私有成員
}
}
void output()
{
Inner inner = new Inner();
inner.output();//外部類成員函式呼叫內部類成員函式
}
Inner GetInner()
{
return new Inner();
}
}
class InnerClass3
{
public static void main(String[] args)
{
//final int a1 = 10;
//System.out.println(a1);
Outer outer = new Outer();
outer.output();
//怎麼在main函式中直接使用Inner,注意Inner的可見性
Outer.Inner inner1 = outer.GetInner();
inner1.output();
Outer.Inner inner2 = outer.new Inner();
inner2.output();
}
}
class Outer
{
public static final int height = 20;
public static int weight = 20;
private int num = 100;//內建類可以訪問private的,public,protected肯定可以
class Inner //定義內建類
{
class InnerInner
{
void output()
{
System.out.println(Outer.this.num);//無論內部累內建多少內部類,內建有多深始終可以直接使用Outer.this
System.out.println(Inner.this.num);
}
}
private int num = 90;
void output()
{
int num = 80;
InnerInner innerinner = new InnerInner();
innerinner.output();
System.out.println(num);//區域性變數
System.out.println(this.num);//內建類私有成員
System.out.println(Outer.this.num);//引用外部類中的私有成員
}
}
void output()
{
Inner inner = new Inner();
inner.output();//外部類成員函式呼叫內部類成員函式
}
Inner GetInner()
{
return new Inner();
}
}
class InnerClass3
{
public static void main(String[] args)
{
//final int a1 = 10;
//System.out.println(a1);
Outer outer = new Outer();
outer.output();
//怎麼在main函式中直接使用Inner,注意Inner的可見性
Outer.Inner inner1 = outer.GetInner();
inner1.output();
Outer.Inner inner2 = outer.new Inner();
inner2.output();
}
}