1、Java 程序设计 编程 实例 初步学习public class Accumulatorpublic int add(int a,int b)return a+b;public int sub(int a,int b)return a-b;public int mul(int a,int b)return a*b;public int div(int a,int b)return a/b;public int mod(int a,int b)return a%b;public int zhi(int a,int b)return ab;public static void main(Strin
2、g args)Accumulator acc=new Accumulator();int a,s,m,d,o,z;a= acc.add(9,5);s=acc.sub(9,5);m= acc.mul(9,5);d=acc.div(9,5);o=acc.mod(9,5);z= acc.zhi(2,5);System.out.println(a+“ “+s+“ “+m+“ “+d+“ “+o+“ “+z);import java.applet.*;import java.awt.*;public class Boy extends Appletpublic void paint(Graphics g
3、)g.setColor(Color.red);g.drawString(“我自横刀向天笑“,10,30);g.setColor(Color.blue);g.drawString(“笑完我就去睡觉“,10,50);public class CompareExamplepublic static void main(String args)int a=9,b=5,c=7,t;if(ab)t=a; a=b; b=t; if(ac)t=a; a=c; c=t; if(bc)t=b; b=c; c=t; System.out.println(“a=“+a+“,b=“+b+“,c=“+c);public
4、class E2public static void main(String args)long a=1,2,3,4;long b=100,200,300,400,500;b=a;System.out.println(“数组 b 的长度:“+b.length);System.out.println(“b0=“+b0);public class E3public static void main(String args)for(int i=20302;ij/2)System.out.println(j); /求 50 以内的素数public class Example14public stati
5、c void main(String args)char x=你,y=情,z=吃;if(xA)y=爱;z=情;elsey=我;z=她;System.out.println(“ “+x+y+z);public class Example15public static void main(String args)char c=0;for(int i=1;iaj+1)t=aj;aj=aj+1;aj+1=t;for(i=0;i60)System.out.println(“math is passed.“);elseSystem.out.println(“math is not passed.“);if
6、(english90)System.out.println(“english is very good.“);elseSystem.out.println(“english is general.“);System.out.println(“我在学习控制语句。 “);System.out.println(“);System.out.println(“);System.out.println(“);System.out.println(“);for(i=1;i10;i+) for(j=1;j=i;j+) if(j=2elseSystem.out.print(j+“+i+“=“+i*j+“ “);
7、System.out.println(“);public class OutputDatapublic static void main(String args)int x=234,y=432;System.out.println(x+“+(2*x);System.out.print(“我输出结果后不回车“);System.out.println(“我输出结果后自动回车到下一行 “);System.out.println(“x+y= “+(x+y);System.out.println(“ “+x+“+“+y+“=234432“);public class ParamTestpublic st
8、atic void main(String args)Person person=new Person();person.change(person);int age=person.age;System.out.println(age);System.out.println(“-“);int i=10;person.change2(i);System.out.println(i);class Personint age=20;public void change(Person person)person=new Person();person.age=30;public void change2(int age)age=40;public class Testpublic int add(int a,int b)return a+b;public int sub(int a,int b)return a-b;public int mul(int a,int b)return a*b;public int div(int a,int b)return a/b;public void outprint()System.out.println(“welcome to java world“);
