大佬写的java代码 JAVA写代码

求大佬,这个用Java怎么写出来

参考Java源代码:

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import java.util.Scanner;

public class Test09 {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

char start, end;

int delta;

int row, col;

int i, j;

do {

System.out.print("The first character: ");

start = scan.next().charAt(0);

System.out.print("The last character: ");

end = scan.next().charAt(0);

} while(start end);

delta = end - start + 1;

for(row=0; rowdelta; row++) {//控制图案整体行数

//上三角形图案

for(i=0; idelta; i++) {//控制一个图案的一行

for(col=0; coldelta; col++) {//控制图案整体列数

for(j=0; jdelta-1-i; j++) {//输出前导空格

System.out.print(" ");

}

for(j=0; j2*i+1; j++) {//输出字母

System.out.print((char)(start + i));

}

for(j=0; jdelta-1-i; j++) {//输出后面空格

System.out.print(" ");

}

System.out.print("     ");    //输出间隔

}

System.out.println();

}

//下三角形图案

for(i=0; idelta-1; i++) {//控制一个图案的一行

for(col=0; coldelta; col++) {//控制图案整体列数

for(j=0; j=i; j++) {//输出前导空格

System.out.print(" ");

}

for(j=0; j2*delta-3-2*i; j++) {//输出字母

System.out.print((char)(start + delta - 2 - i));

}

for(j=0; j=i; j++) {//输出后面空格

System.out.print(" ");

}

System.out.print("     ");    //输出间隔

}

System.out.println();

}

System.out.println();

}

}

}

运行测试:

大佬求帮助写这条Java代码,急

package test1;

import java.util.Scanner;

public class Test {

public static void main(String[] args){

Scanner scanner = new Scanner(System.in);

System.out.println("输入数组1长度");

int n1 = scanner.nextInt();

System.out.println("输入数组1");

String nullString1 = scanner.nextLine();

String numsString1 = scanner.nextLine();

String[] split1 = numsString1.split(" ");

System.out.println("输入数组2长度");

int n2 = scanner.nextInt();

System.out.println("输入数组2");

String nullString2 = scanner.nextLine();

String numsString2 = scanner.nextLine();

String[] split2 = numsString2.split(" ");

System.out.println("输入条件");

String numsString3 = scanner.nextLine();

String[] split3 = numsString3.split(" ");

int start = Integer.valueOf(split3[0]);

int mubiao = Integer.valueOf(split3[1]);

int number = Integer.valueOf(split3[2]);

for(int i = (mubiao-1),y=(start-1),c = 0 ; c  number ; i++,y++,c++){

split1[y] = split2[i];

}

for(int i =0 ; i  split1.length ; i++){

System.out.print(split1[i]+" ");

}

}

}

java输入输出流与文件,求源代码!感谢大佬!

你好,java的API中提供了用于对象输入输出文件的操作,实例代码如下:

定义单词类如下(注意:你定义的类要实现Serializable接口)

public class Words implements Serializable {

private int size;

private String[] words;

public Words(){};

public Words(String...strs){

this.words = strs;

this.size = strs.length;

}

@Override

public String toString() {

return "Words{" +

"size=" + size +

", words=" + Arrays.toString(words) +

'}';

}

}

2. 对象输入输出api测试类

public class ObjIOTest {

public static void main(String[] args) {

String path = "d:/myIOTest.txt";

ObjIOTest objIOTest = new ObjIOTest();

Words words = new Words("hello", "my", "dear", "friend");

try {

objIOTest.writeObject(path,words);

Words wordsFromFile = (Words)objIOTest.readObject(path);

System.out.println(wordsFromFile.toString());

} catch (IOException | ClassNotFoundException e) {

e.printStackTrace();

}

}

//java serialize a object to file

public void writeObject(String path,Object map) throws IOException{

File f=new File(path);

FileOutputStream out=new FileOutputStream(f);

ObjectOutputStream objwrite=new ObjectOutputStream(out);

objwrite.writeObject(map);

objwrite.flush();

objwrite.close();

}

// read the object from the file

public Object readObject(String path) throws IOException, ClassNotFoundException{

FileInputStream in=new FileInputStream(path);

ObjectInputStream objread=new ObjectInputStream(in);

Object map=objread.readObject();

objread.close();

return map;

}

}

把两段代码拷贝到一个包下即可运行了,希望您的问题得到解答

请问哪位大佬能帮忙写一下java代码,一个五行九列的程序,如图

public class Pyramid

{

public static void main(String[] args)

{

int i=0,j=0,n=6,k=0;

for(i=0; in; i++)

{

k=1;

for(j=0; j(n+i); j++)

{

if(jn-i-1)

System.out.print(" ");

else

{

System.out.print(""+k);

if(j(n-1))

k++;

else

k--;

}

}

System.out.println(" ");

}

}

}

求大佬帮助写这条Java代码

public class Person {

public String name;

public int age;

public Person(String name, int age){

this.name = name;

this.age = age;

}

public Person(String name){

this.name = name;

this.age = 20;

}

public void work(){

System.out.println("我正在工作!");

}

public static void main(String[] args) {

Person p = new Person("I");

p.work();

}

}

-------------------------------------------------------------

public class Person {

public String name;

public int age;

public Person(String name, int age){

this(name);

this.age = age;

}

public Person(String name){

this.name = name;

this.age = 20;

}

public void work(){

System.out.println("我正在工作!");

}

public static void main(String[] args) {

Person p = new Person("I");

p.work();

}

}

class Student extends Person{

public Student(String name){

super(name);

}

public void work(){

System.out.println("学生在学习!");

}

}

class Teacher extends Person{

public Teacher(String name){

super(name);

}

public void work(){

System.out.println("老师在授课!");

}

}


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