simple java(四)--if-else(2)

conditional operator

For example:
if (num1 > num2)larger = num1;
else
larger = num2;

􀂆 is the same as
larger = (num1 > num2) ? num1 : num2;

例三.(搵雙數定單數)

import javax.swing.*;

public class IsEvenOperator {

public static void main( String args[] ) {

String inStr;

int num;

inStr = JOptionPane.showInputDialog("Enter a number.");

num = Integer.parseInt( inStr );

JOptionPane.showMessageDialog( null,num + " is "+ ( num%2==0 ? "even." : "odd." ),

"Results", JOptionPane.PLAIN_MESSAGE );System.exit( 0 );

例四:(比較大小)

import javax.swing.JOptionPane;

public class Larger {

public static void main( String args[] ) {

String firstNumber;

String secondNumber;

int number1;

int number2;

int larger;

firstNumber = JOptionPane.showInputDialog("Enter first integer" );

secondNumber = JOptionPane.showInputDialog("Enter second integer" );

number1 = Integer.parseInt( firstNumber );

number2 = Integer.parseInt( secondNumber );

larger = ( number1 > number2 ) ? number1 : number2;

JOptionPane.showMessageDialog( null,"The larger number is " + larger + ".");

System.exit( 0 );}}

執行結果:

Enter first integer

34

Enter second integer

45

The larger number is

45

****************************