/*编写一个方法并调用它，求两个整数中的较大值。*/class A {int z; int max(int x,int y){ if(x>y) {z=x; } else {z=y; } System.out.println("Max="+z); return z; }}public calss Text1{ public static void main(String[] args){ A a=new A(); a.max(7,9); }}

- -别说太基础，我一步步来

/*求三个实数的最大值*/class Max{ double m; double max(double x,double y,double z){ if(x>y){ if(x>z) m=x; else m=z; } else { if(y>z) m=y; else m=z; } System.out.println("Max="+m); return m; }}public class Test2{ public static void main(String[] args){ Max a=new Max(); a.max(3,6,4); }}

/*编写两个方法sum()与average()分别求三个整数的和与平均数，并在average()方法中实现对sum()方法的调用。*/sum()方法头：int sum(int x,int y,int z)average()方法头:double average(int x,int y,int z) public class Alone5_4{ int m; int n; int sum(int x,int y,int z){ m=xyz; return m; } double average(int x,int y,int z){ n=sum(x,y,z) return n; } public static void main(String[] args){ Alone5_4 a=new Alone5_4(); System.out.println("average(20,34,78)+>"+a.average(20,34,78)); }}

/*编写伞个求平均数的方法，并调用重载它们方法头： double average(int a,int b)方法头：double average(int a,int b,int c,int d)运行结果提示：average(10,20)=>15.0average(10,20,30)=>20.0average(10,20,30,40)=>25.0*/public class Alone5_5{ double average(int a,int b){ return (a+b)/2; } double average(int a,int b,int c){ return (a+b+c)/3; } double average(int a,int b,int c,int d){ return (a+b+c+d)/4; } public static void main(String[] args){ Alone5_5 avg=new Alone5_5(); System.out.println("average(10,20)=>"ave.average(10,20)); System.out.println("average(10,20,30)=>"ave.average(10,20,30)); System.out.println("average(10,20,30,40)=>"ave.average(10,20,30,40)); }}

/*Alone5_6类拥有下列成员变量，请编写构造函数，使用它初始化成员变量，并编写三个方法来获取变量的值，最后，对所编写的代码进行测试。注： 重载构造函数时，请使用 this(...)public class Alone5_6{ int a; double b; String c; public Alone5_6()} public Aone5_6(int a){...} public Aone5_6(int a,double b){...} public Aone5_6(int a,double b,String c){...}int getA(){...}double getB(){...}String getC(){...}}*/public class Alone5_6{int a;double b;String c; public Alone5_6(int a,double b,String c){ System.out.println("a="+a); return a; System.out.println("b="+b); return b; System.out.println(c); Return c;} public Alone5_6(){this(2,2.5,"你好"}; System.out.println("hello");} pyblic Alone5_6(int a,double b){this(3,3.5,"bye"); System.out.println("a="a); return a; System.out.println("b"+b); return b; }public Alone5_6(int a){this(4,4.5,"晚会"); System.out.println("a="+a); return a;}}public class Test{ public static void main(String[] args){ Alone5_6 test=new Alone5_6(5); Alone5_6 test1=new Alone5_6(); Alone5_6 test2=new Alone5_6(5,5.5); Alone5_6 test3=new Alone5_6(6,6.5,"出来吧"); }}

今天就到这里吧- -学校22点半就断电了- -幸好是笔记本能抗个两小时，自己给加油！！！！！！