单例模式下的嵌套调用导致栈溢出

单例模式下的嵌套调用导致栈溢出

package com.asyntask;

import android.util.Log;

public class Demo2 {
public void print() {
Demo1.getInstance().print();
Log.d("Demo2", "demo2");
}
}

package com.asyntask;

import android.util.Log;

public class Demo1 {

private static Demo1 mDemo1;

private Demo2 mDemo2;

public static Demo1 getInstance(){

if(mDemo1 == null){

mDemo1 = new Demo1();

}

return mDemo1;

}

public void print(){
Log.d("Demo1", "Demo1");
}

public Demo1() {
mDemo2 = new Demo2();
mDemo2.print();
}

}

package com.asyntask;

import android.util.Log;

public class Demo2 {
public void print() {
Demo1.getInstance().print();
Log.d("Demo2", "demo2");
}
}

写代码过程犯的错误，记录下以后避免