Java中的基本数据类型语法补充

public class CalcAndAssign {
    public static void main(String[] args) {
        int a = 16;
        a >>= 2;
        System.out.println(a); // 此时a为4

        a*=9;
        System.out.println(a); // 此时a为36
    }
}

public class AutoConvert {
    public static void main(String[] args) {
        int intVal = 99;
        long longVal = intVal;
        long longVal2 = intVal + 1;
        System.out.println(longVal2);

        float floatVal = 11.32f;
        double doubleVal = floatVal;
        double doubleVal2 = doubleVal * 2;
        System.out.println(doubleVal2);

        int a = 99;
        double b = 5;
        System.out.println(a/b);

        char ch = ‘A‘;
        int chNum = ch;
        int chNumCalc = ch + 10;
        System.out.println(ch);
        System.out.println(chNum);
        System.out.println(chNumCalc);
    }
}

public class ForceConvert {
    public static void main(String[] args) {
        int intVal = 99;
        long longVal = 19999;
        intVal = (int)longVal;

        float floatVal = 11.32f;
        double doubleVal = 3344556.789;
        floatVal = (float) doubleVal;

        int A = 65;
        char b = (char) A;
        System.out.println(b);
    }
}

public class ForceConvertValueLoss {
    public static void main(String[] args) {
        int intVal = 99;
        long longVal = 5555555555555L;
        intVal = (int) longVal;
        System.out.println(intVal);

        float floatVal = 11.32f;
        double doubleVal = 1234567890.123456;
        floatVal = (float) doubleVal;
        System.out.println(floatVal);
        System.out.println(doubleVal);
    }
}

public class CalcValueLoss {
    public static void main(String[] args) {
        int intVal = 2000000000;
        System.out.println(intVal + intVal);
    }
}