Java——数据类型运算和强制转换

整数类型和浮点数之间的运算

public class learn{

    public static void main(String[] args){

        float number1=45.56f;

        int number2=152;

        System.out.println("number1和number2的和等于："+(number1+number2));

        System.out.println("number2减去number1等于："+(number2-number1));

    }

}

布尔类型

public class learn{

    public static void main(String[] args){

        int a=2;

        int b=5;

        boolean result1=((a>b)&&(a!=b));

        boolean result2=((a>b)||(a!=b));

        System.out.println(result1);

        System.out.println(result2);

        boolean c=20>50?true:false;  //三元运算符

        System.out.println(c);

    }

}

运算

public class learn{

    public static void main(String[] args){

        byte mybyte = 127;

        int myint = 150;

        float myfloat = 452.12f;

        char mychar=10;

        double mydouble = 45.226;

        System.out.println("mybyte+myint="+(mybyte+myint));

        System.out.println("mybyte+myfloat="+(mybyte+myfloat));

        System.out.println("mybyte*myint="+mybyte*myint);

        System.out.println("mybyte/myint="+mybyte/mychar);

    }

}

public class learn{

    public static void main(String[] args){

        int a=(int)45.22;

        long y=(long)456.6f;   //强制类型转换

        int b=(int)'d';

        System.out.println(a);

        System.out.println(y);

        System.out.println(b);

    }

}