import java.util.Scanner;
public class test1 {
public static void main(String[] args){
Scanner input = new Scanner(System.in);
int money,age;
System.out.println("Please tell me your money :");
money = input.nextInt();
System.out.println("Please tell me your age :");
age = input.nextInt();
if((age <= 30)&&(money>3000)){
System.out.println("come on baby!");
}
else{
System.out.println("get out!");
}
}
}
这里说一下&&和&的区别,&&的话,当第一个条件不满足时,就不会再去判断第二个条件,而对于&,当第一个条件不满足的时候,仍会去判断第二个条件!还有||和|这两个也有区别,对于|来说,当第一个条件满足时,仍然会去判断第二个条件,而对于||来说,当第一个条件满足时,就不会再去判断第二个条件!
我们下面有四个小程序来验证这一点,程序1和程序2,用来比较|和||,程序3和程序4比较&和&&
程序1:
public class test1 {
public static void main(String[] args){
int a,b;
a = 10;
b = 15;
if((a++>9) | (b++<16)){
System.out.println("OK!");
System.out.println(a);
System.out.println(b);
}
else{
System.out.println("FAILE!");
System.out.println(a);
System.out.println(b);
}
}
}
程序2:
public class test1 {
public static void main(String[] args){
int a,b;
a = 10;
b = 15;
if((a++>9) || (b++<16)){
System.out.println("OK!");
System.out.println(a);
System.out.println(b);
}
else{
System.out.println("FAILE!");
System.out.println(a);
System.out.println(b);
}
}
}
程序3:
public class test1 {
public static void main(String[] args){
int a,b;
a = 10;
b = 15;
if((a++>10) & (b++<16)){
System.out.println("OK!");
System.out.println(a);
System.out.println(b);
}
else{
System.out.println("FAILE!");
System.out.println(a);
System.out.println(b);
}
}
}
程序4:
public class test1 {
public static void main(String[] args){
int a,b;
a = 10;
b = 15;
if((a++>10) && (b++<16)){
System.out.println("OK!");
System.out.println(a);
System.out.println(b);
}
else{
System.out.println("FAILE!");
System.out.println(a);
System.out.println(b);
}
}
}
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