问题描述

两个类，实例化问题，实例化报错

public class Paixu {

public static void main(String[] args) {    //   Paixu px=new Paixu();    MaoPaoSort mp=new MaoPaoSort();//上面这里就开始报错了：No enclosing instance of type Paixu is accessible. Must qualify the allocation with an enclosing instance of type Paixu (e.g. x.new A() where x is an instance of Paixu).}class MaoPaoSort {    public  void test1() {        int a[] = { 1 1234 356 123 56346 73 45342342 1 3 56 };        for (int i = 0; i < a.length; i++) {            for (int j = i + 1; j < i - 1; j++) {                if (a[i] < a[j]) {                    int tmp = a[i];                    a[i] = a[j];                    a[j] = tmp;                    System.out.println(a[j]);                }            }        }    }}

}

解决方案

不能在静态函数中new，把 MaoPaoSort改成静态的类

解决方案二：
MaoPaoSort是内部类，不能再Paixu外直接new
改成

 public class Paixu {public static void main(String[] args) {      Paixu px=new Paixu();    MaoPaoSort mp=px.getMPSort();//上面这里就开始报错了：No enclosing instance of type Paixu is accessible. Must qualify the allocation with an enclosing instance of type Paixu (e.g. x.new A() where x is an instance of Paixu).}public MaoPaoSort getMPSort(){        return new MaoPaoSort();    }class MaoPaoSort {    public  void test1() {        int a[] = { 1 1234 356 123 56346 73 45342342 1 3 56 };        for (int i = 0; i < a.length; i++) {            for (int j = i + 1; j < i - 1; j++) {                if (a[i] < a[j]) {                    int tmp = a[i];                    a[i] = a[j];                    a[j] = tmp;                    System.out.println(a[j]);                }            }        }    }}}

解决方案三：
或者把MaoPaoSort从Paixu中移出来

解决方案四：
http://m.blog.csdn.net/blog/sunny2038/6926079

解决方案五：
应该是静态方法不可以访问非静态问题，给内部类加上Static修饰就好了然后冒泡好像有一点点问题

public class Paixu {

public static void main(String[] args) {    // Paixu px=new Paixu();    MaoPaoSort mp = new MaoPaoSort();    mp.test1();    // 上面这里就开始报错了：No enclosing instance of type Paixu is accessible. Must    // qualify the allocation with an enclosing instance of type Paixu (e.g.    // x.new A() where x is an instance of Paixu).}static class MaoPaoSort {    public void test1() {        int a[] = { 1 1234 356 123 56346 73 45342342 1 3 56 };        for (int i = 0; i < a.length-1; i++) {            for (int j = 0; j < a.length-i-1; j++) {                if (a[j] < a[j+1]) {                    int tmp = a[j];                    a[j] = a[j+1];                    a[j+1] = tmp;

// System.out.println(a[j]);
}
}
}
for (int i : a) {
System.out.println(i);
}
}
}
}

解决方案六：
1.内部类静态化
2.把内部类拿出来

解决方案七：
Paixu.MaoPaoSort mp=new Paixu.MaoPaoSort();