java第一周作业

package doom;

import java.rmi.server.SocketSecurityException;

public class firsttest {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int a =1;
		int b =3;
		int c =0;
		c=a;
		a=b;
		b=c;
		System.out.println(a);
		System.out.println(b);

	}

}

　　

package doom;

public class firsttest2 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int a = 1000;
		int ge = a%10;
		int shi = a/100%10;
		int bai = a/10%100;
		int qian = a/1000;
		int he = ge+shi+bai+qian;
		System.out.println(ge);
		System.out.println(shi);
		System.out.println(bai);
		System.out.println(qian);
		System.out.println(he);
		

	}

}

　　

package doom;

public class firsttest3 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		double a = 95;//华氏温度
		double b = 36;//摄氏温度
		double c = (a-32)*5/9;
		double d = b*9/5+32;
		System.out.println(c);
		System.out.println(d);

	}

}

　　

package doom;

public class firsttest4 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		char a = 'A'+32;
		System.out.println(a);

	}

}