Select structure if java

Flowchart of FIG. 1-1 if ... else if ... else statement

Selection structure if statement ternary operator Conversion

　　Ternary operator, and it is similar to if-else statement syntax is as follows:

　　To determine the conditional expression 1:? 2 expression

 

　　Ternary operator will get a result, typically used for a variable assignment, when the judgment condition is satisfied, the expression that evaluates to a value , or the result of expression2 value .

java.util.Scanner Import; 
class Demo03 
{ 
	public static void main (String [] args) 
	{ 
		Scanner Scanner new new SC = (the System.in); 
		System.out.println ( "Enter first integer"); 
		int num1 sc.nextInt = (); 
		System.out.println ( "Please enter the second integer"); 
		int num2 = sc.nextInt (); 
		int max; 
		IF (num1> num2) { 
			 max = num1; 
		} the else { 
			 max num2 =; 
		} 
		System.out.println ( "maximum value:" + max); 
	} 
}

　　

java.util.Scanner Import; 
Import java.util.Random; 
class Demo04 
{ 
	public static void main (String [] args) 
	{ 
		Scanner Scanner new new SC = (the System.in); 
		.. 1 // input three numbers so that, with ternary operator selecting the maximum value 
		System.out.println ( "enter first integer"); 
		int num1 = sc.nextInt (); 
		System.out.println ( "Please enter the second integer"); 
		int num2 sc.nextInt = (); 
		System.out.println ( "Please enter a third integer"); 
		int num3 = sc.nextInt (); 
		int max = (num1> num2 num1: num2?)> num3 (num1>? ? num1 num2: num2): num3; 
		System.out.println ( "maximum value:" + max); 

		. // 2 0 rock scissors cloth 2 is 1, 
		// 0 or a program randomly generated 1 or 2, 
		// user enter a 0 or 1 or 2, mora, win or lose the printing level or a
		System.out.println ( "0 rock scissors cloth 2 is 1, the program randomly generates a 0 or 1 or 2, a user input 0 or 1 or 2, mora, win or lose the print or a flat"); 
			BREAK; 
				Case. 1:if (num4==2)
			{
		Random r= new Random();
		r.nextInt Num4 = int (. 3); 
		int Num5; 
		the while (to true) { 
			System.out.println ( "Enter a 0 or 1 or 2"); 
			Num5 sc.nextInt = (); 
			IF (Num5> = 0 && Num5 < . 3) 
			{ 
				BREAK; 
			} 
				System.out.println ( "re-enter the correct value of 0 or 1 or 2"); 
			} 
		Switch (Num5) { 
			Case 0: IF (Num4 == 1) 
			{ 
				System.out.println ( "lost"); 
			} the else IF (Num4 == 2) 
			{ 
				System.out.println ( "win"); 
			} the else { 
				System.out.println ( "the flat"); 
			}
			the else {} 
				System.out.println ( "the flat");
				System.out.println ( "lost"); 
			} the else IF (Num4 == 0) 
			{ 
				System.out.println ( "win");
			}
			} 
			BREAK; 
			Case 2: IF (Num4 == 0) 
			{ 
				System.out.println ( "lost"); 
			} the else IF (Num4 ==. 1) 
			{ 
				System.out.println ( "win"); 
			} the else { 
				System.out.println ( "the flat"); 
			} 
			BREAK; 
		} 
		System.out.println ( "computer random values:" + num4 + "input:" + Num5); 


		.. 3 // user to input 1-7, If the print is 1-5 days, if the printing is 6-7 days rest 
		int Num6; 
		the while (to true) { 
			System.out.println ( "enter 1-7"); 
			Num6 sc.nextInt = (); 
			IF (Num6> =. 1 && Num6 <. 8) 
			{ 
				BREAK;. 5 =) 
		{ 
			System.out.println ( "days");
				System.out.println ( "re-enter the correct value 1-7"); 
			} 
		IF (Num6> =. 1 && Num6 <=. 5)
		the else {} 
			System.out.println ( "holidays"); 
		} 
	} 
}