三元运算符类型提升问题

    public static void t1(){
        int i=0;
        System.out.println("this is "+(i>0?99.9:9));//9.0
    }
    public static void t2(){
        float i=0;
        System.out.println("this is "+(i>0?99:9));//9
    }
    public static void t3(){
        double i=0;
        System.out.println("this is "+(i>0?99:9));//9
    }
    public static void t4(){
        int i=0;
        System.out.println("this is "+(i=(i>0?'a':9)));//9
    }

三元运算符(条件?结果1:结果2)中类型提升只与两个结果有关，与条件无关。结果中有高级的类型就会提升，否则不会提升。