In depth understanding :Java is a type safe language while C++ is a non type safe language

Anyone with experience with C++ will find that we can use 0 as false and non-zero as true. A function of type bool can return an int and automatically convert 0 to false and non-zero to true. The code example is as follows:

#include<iostream>
 #include<stdlib.h>
 using namespace std;

 bool fun()//The function return type is bool, but we can return an int in the function.
 {
     return 1;
 }

 void main()
 {
     int a=1;
     if(a)//A is of type int, but can be used as a bool.
     {
         cout<<"C++ Non-type safe. "<<endl;
     }
     system("pause");
 }

However, in Java, we can't use this way, Java can't do int to bool type, such as the following code:

public class TypeSafeTest {
    public static void main(String[] args) {
        int i=1;
        if(i)
        {
            System.out.println("java Is a type safe language ");
        }
    }
}

Execution of the above code will report the following error:

Exception in thread "main" java.lang.Error: Unresolved compilation problem: Type mismatch: cannot convert from int to boolean 
at TypeSafeTest.main(TypeSafeTest.java:4)

The above error indicates that an int type cannot be automatically converted to a bool type in Java. That's what type safety means.