================方法一==================
class LianXi{
public static void main(String [] args){
int a = 10;
int b =20;
System.out.println("a="+a+",b="+b);
int c =a;
a = b;
b = c;
System.out.println("a="+a+",b="+b);
}
}
结果：
a=10,b=20
a=20,b=10
======================方法二=====================
class LianXi{
public static void main(String [] args){
int a = 10;
int b =20;
System.out.println("a="+a+",b="+b);
a =a^b;
b =a^b; //(a^b) ^b = a
a =a^b; //(a^b)^a =b
System.out.println("a="+a+",b="+b);
}
}
结果：
a=10,b=20
a=20,b=10
===============方法三================
class LianXi{
public static void main(String [] args){
int a = 10;
int b =20;
System.out.println("a="+a+",b="+b);
a =a+b; //a =10+20=30
b =a-b; //b=30-20 =10
a =a-b; //a=30-10=20
System.out.println("a="+a+",b="+b);
}
}
结果：
a=10,b=20
a=20,b=10
===============方法四=================
class LianXi{
public static void main(String [] args){
int a = 10;
int b =20;
System.out.println("a="+a+",b="+b);
b =(a+b)-(a=b); //b = (10+20) -(20) =10 a=20
System.out.println("a="+a+",b="+b);
}
}
结果：
a=10,b=20
a=20,b=10
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