交换输入的两个数字

Exchange1

public class Exchange{
  public static void main(String[]args){
	java.util.Scanner input=new java.util.Scanner(System.in);
	System.out.println("请输入两个数字：");
	int num1=input.nextInt();
	int num2=input.nextInt();
	System.out.println("现在顺序为"+num1+"	"+num2);
	int c=num1;
	num1=num2;
	num2=c;
	System.out.println("交换过之后为"+num1+"	   "+num2);
	
	}
}

Exchange2

public class Exchange{
  public static void main(String[]args){
	java.util.Scanner input=new java.util.Scanner(System.in);
	System.out.println("请输入两个数字：");
	int num1=input.nextInt();
	int num2=input.nextInt();
	System.out.println("现在顺序为"+num1+"	"+num2);
	int c=num1+num2;
	num1=c-num1;
	num2=c-num2;
	System.out.println("交换过之后为"+num1+"	   "+num2);
	
	}
}	

Exchange3

public class Exchange{
  public static void main(String[]args){
	java.util.Scanner input=new java.util.Scanner(System.in);
	System.out.println("请输入两个数字：");
	int num1=input.nextInt();
	int num2=input.nextInt();
	System.out.println("现在顺序为"+num1+"	"+num2);
	num1=num1^num2;
	num2=num1^num2;
	num1=num1^num2;
	System.out.println("交换过之后为"+num1+"	   "+num2);
	
	}
}