Day08 ternary operator extension operator character connector symbol priority

Ternary operator （ Conditional operator ）

x ? y : z ( Because there are three factors , Commonly known as ternary )

If x ==turn , The result is y, Otherwise z

Conditions ？turn Output ：false Output （ amount to if sentence ）

package operator;

public class demo06Day07 {
    
    public static void main(String[] args) {
    
        int a = 59;
        //boolean b=true;
        String c= a>60?" pass ":" fail, ";  // If a Greater than 60, Then output the first value , Otherwise, output the second value .
        System.out.println(c);
    }
}

Extended assignment operators

1. +=
2. -+
3. *=
4. /=

package operator;

public class demo05Day07 {
    
    public static void main(String[] args) {
    
        int a =10;
        int b =20;
        a+=b;// a = a+b
        System.out.println(a);
        //a-=b;// a= a-b
        //System.out.println(a);
        //a*=b;// a= a*b
        //System.out.println(a);
        //a/=b;// a= a/b
        //System.out.println(a);

    }
}

String connector

package operator;

public class demo07Day07 {
    
    public static void main(String[] args) {
    
        int a=10;
        int b = 20;
        System.out.println(" The output is ："+a+b);// First recognize the string , Connect according to string rules 
        System.out.println(" The output is ："+(a+b));// Recognize parentheses , The parentheses are finished , Then connect in sequence 
        System.out.println(a+b+" The output is ：");// After the operation, it is connected with the string 
        /*  If the string is recognized first in order , Just connect by string without operation  */
    }
}

Symbol priority , Be careful

1. If you identify the string first , Is to string all the strings
2. If the operation is recognized first , Just calculate first and then string .

summary ： It depends on which priority , I'll do that .

priority ：

1. （） Parentheses operate first
3. /
6. According to the order