java写单词纠错代码 java重写方法报错

java 代码纠错

import java.util.*;

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public class Final{

public static void main (String []args){

double AssignmentsScore=Assignments();

System.out.println(AssignmentsScore);

}

public static double Assignments(){

Scanner stdin = new Scanner(System.in);

System.out.println("Please input your Assignment1 score (out of a maximum of 10 marks each)");

double Assignment1=stdin.nextDouble();

if (Assignment1=1 Assignment1=10){

System.out.println("Please input your Assignment2 score (out of a maximum of 10 marks each)");

double Assignment2=stdin.nextDouble();

double AssignmentsScore=Assignment1+Assignment2;

return AssignmentsScore;

}else{

System.out.println("Please input the score between 1-10");

return 0;

}

}

}

像这样就好了.你需要保证每一种可能都有一个返回值

java代码纠错

//瞧代码

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.util.regex.Pattern;

public class paixuqi implements ActionListener

{

public double[] shengchengshuzu(String input) //将字符串数据转化为数组

{

String vector[] = new String[20];

String regex = " ";

Pattern p = Pattern.compile(regex); //按照 空格进行分割

String[] r = p.split("input"); //分割input并产生数组

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

vector[i] = r[i].trim();

// if (!((r[i].trim()).equals("")))

// ; //去掉该字符串首尾的空格、制表符等空白字符匹配项

// {

// }

}

double[] jieguo = new double[20];

for (int i = 0; i = 19; i++) {

jieguo[i] = Double.valueOf(vector[i]).doubleValue();

}

return jieguo;

}

public double[] bubble(double a[]) //冒泡排序

{

double temp;

int size = a.length;

for (int i = size - 1; i = 1; i--) {

for (int j = 0; j i; j++) {

if (a[j] a[j + 1]) {

temp = a[j];

a[j] = a[j + 1];

a[j + 1] = temp;

}

}

}

return a;

}

String zhuanhuashuru(String a) throws IOException {

RandomAccessFile f = new RandomAccessFile(a, "r");

String record = f.readLine();

return record;

}

TextArea text1, text2, text3;

private Button button;

public static void main(String[] args) {

paixuqi px=new paixuqi();

px.initGUI();

}

public void initGUI() {

Label label1, label2, label3;

button = new Button("输入完毕");

Frame f = new Frame("paixuqi");

f.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

f.setLayout(new FlowLayout());

text1 = new TextArea("", 10, 30);

text2 = new TextArea("", 10, 30);

text3 = new TextArea("排序结果:", 10, 30);

label1 = new Label("载入文件，输入地址");

label2 = new Label("手动输入数据");

label3 = new Label("排序结果");

f.add(text1);

f.add(label1);

f.add(text2);

f.add(label2);

f.add(text3);

f.add(label3);

f.add(button);

f.setSize(780, 400);

// f.pack();

f.setVisible(true); //以上为操作界面描述

// text1.addActionListener(this);

// text2.addActionListener(this);

// text3.addActionListener(this);

button.addActionListener(this);

}

public void actionPerformed(ActionEvent e) {

String huancun1, huancun2;

huancun1 = text1.getText(); //提取输入的数据

huancun2 = text2.getText();

if (e.getSource() == button) //按钮出发时，开始运算

{

try {

text3.setText(paixu(huancun1, huancun2));

} catch (IOException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

}

}

public String paixu(String s, String k) throws IOException {

String shuju;

if (s != null) {

shuju = zhuanhuashuru(s);

} else if (k != null) {

shuju = k;

} //得到需要排序的字符串形式的数组

else {

return null;

}

double[] go = shengchengshuzu(shuju); //字符串转为数组

double[] result = bubble(go); //排序

String over = result.toString(); //排序结果转为字符串

return over;

}}

java纠错

改 了一下你的代码，供参考：

package myExercise;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.util.*;

public class TestAnyType extends Comparable implements ComparableObject,ListAnyType{

private int theSize;

private AnyType [] theItems;

private AnyType [] theItems2;

public int size(){

return theSize;

}

public void ensureCapacity(int newCapacity){

if(newCapacity theSize)

return;

AnyType []old = theItems;

theItems = (AnyType []) new Object[ newCapacity ];

for( int i=0; isize(); i++)

theItems[i]=old[i];

}

public void add(int idx, AnyType x){

if(theItems.length == size())

ensureCapacity(size()*2+1);

for(int i=theSize; iidx; i--)

theItems[i]=theItems[i-1];

theItems[idx]=x;

theSize++;

}

public boolean judge(){

for(int i=0; i+1size(); i++){

if(theItems[i].compareTo(theItems[i+1])0){

return false;

}

else if(size()=1){

return false;

}

}return true;

}

public AnyType everyOther(){//循环内和循环外都应该返回，因为有可能循环不执行

for(int i=0;(2*i)size();i++){

theItems2[i]=theItems[2*i];

return theItems2[i];

}

return theItems2[0];

}

public boolean equalList(){

for(int i=0;isize();i++){

if(theItems2[i]!=theItems[i]){

return false;

}

}

return true;

}

public int compareTo(Object o) {

// TODO Auto-generated method stub

return 0;

}

public boolean add(AnyType e) {

// TODO Auto-generated method stub

return false;

}

public boolean addAll(Collection? extends AnyType c) {

// TODO Auto-generated method stub

return false;

}

public boolean addAll(int index, Collection? extends AnyType c) {

// TODO Auto-generated method stub

return false;

}

public void clear() {

// TODO Auto-generated method stub

}

public boolean contains(Object o) {

// TODO Auto-generated method stub

return false;

}

public boolean containsAll(Collection? c) {

// TODO Auto-generated method stub

return false;

}

public AnyType get(int index) {

// TODO Auto-generated method stub

return null;

}

public int indexOf(Object o) {

// TODO Auto-generated method stub

return 0;

}

public boolean isEmpty() {

// TODO Auto-generated method stub

return false;

}

public IteratorAnyType iterator() {

// TODO Auto-generated method stub

return null;

}

public int lastIndexOf(Object o) {

// TODO Auto-generated method stub

return 0;

}

public ListIteratorAnyType listIterator() {

// TODO Auto-generated method stub

return null;

}

public ListIteratorAnyType listIterator(int index) {

// TODO Auto-generated method stub

return null;

}

public boolean remove(Object o) {

// TODO Auto-generated method stub

return false;

}

public AnyType remove(int index) {

// TODO Auto-generated method stub

return null;

}

public boolean removeAll(Collection? c) {

// TODO Auto-generated method stub

return false;

}

public boolean retainAll(Collection? c) {

// TODO Auto-generated method stub

return false;

}

public AnyType set(int index, AnyType element) {

// TODO Auto-generated method stub

return null;

}

public ListAnyType subList(int fromIndex, int toIndex) {

// TODO Auto-generated method stub

return null;

}

public Object[] toArray() {

// TODO Auto-generated method stub

return null;

}

public T T[] toArray(T[] a) {

// TODO Auto-generated method stub

return null;

}

}

JAVA纠错

MouseListener是一个接口，要实现里面的抽象方法就行了

正确代码如下：

package test;

import java.awt.*;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import javax.swing.*;

class Frame{

public static void main(String[] args)

{ MyJFrame mif=new MyJFrame("test");}

}

class MyJFrame extends JFrame implements MouseListener

{ JButton a=null; JButton b=null;

JButton c=null;

JPanel p1=new JPanel();

JPanel p2=new JPanel();

Container cp=null;

MyJFrame(){ this("no title"); }

MyJFrame(String title)

{

super(title);

a=new JButton("red");

b=new JButton("blue");

c=new JButton("yellow");

cp=getContentPane();

cp.add(p1,BorderLayout.CENTER);

p1.setBackground(Color.GREEN);

p2.add(a,BorderLayout.SOUTH);

p2.add(b,BorderLayout.SOUTH);

p2.add(c,BorderLayout.SOUTH);

cp.add(p2,BorderLayout.SOUTH);

p1.addMouseListener(this);//添加监听者 setSize(500,400); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLocationRelativeTo(null); setVisible(true); public void mousePressed(MouseEvent e){} public void mouseReleased(MouseEvent e){} public void mouseClicked(MouseEvent e){ if(a) p1.setBackground(Color.RED); if(b) p1.setBackground(Color.BLUE); if(c) p1.setBackground(Color.YELLO); } public void mouseEntered(MouseEvent e){} public void mouseExited(MouseEvent e){} }}

}

@Override

public void mouseClicked(MouseEvent e) {

// TODO 自动生成的方法存根

}

@Override

public void mousePressed(MouseEvent e) {

// TODO 自动生成的方法存根

}

@Override

public void mouseReleased(MouseEvent e) {

// TODO 自动生成的方法存根

}

@Override

public void mouseEntered(MouseEvent e) {

// TODO 自动生成的方法存根

}

@Override

public void mouseExited(MouseEvent e) {

// TODO 自动生成的方法存根

}

}

java编程纠错

import java.util.Vector;

public class Test2 {

class student {

String name;

int mark;

student(String n, int m) {

name = n;

mark = m;

}

public String getname() {

return name;

}

public int getJavaMark() {

return mark;

}

};

static Vectorstudent students = new Vectorstudent();//

static int t = getNum();

public static int getNum() {

return students.size();

}

public static int getAverage() {

int sum = 0;

int num = getNum();

for (int i = 0; i num; i++) {

sum = sum + students.get(i).getJavaMark();

}

return sum / num;

}

public static int gethighest() {

int num = getNum();

int temp = 0;

for (int j = 0; j num; j++) {

if (students.get(j).getJavaMark() temp)

temp = students.get(j).getJavaMark();

}

return temp;

}

public static int getlowest() {

int num = getNum();

int temp = 100;

for (int k = 0; k num; k++) {

if (students.get(k).getJavaMark() temp)

temp = students.get(k).getJavaMark();

}

return temp;

}

void display() {

for (int l = 0; l t; l++) {

System.out.println("学生的名字" + students.get(l).getname() + "java的成绩"

+ students.get(l).getJavaMark());

}

}

public static void main(String[] args) {

Test2 s = new Test2();

student s1 = s.new student("jimmy", 88);

student s2 = s.new student("Lucy", 90);

student s3 = s.new student("tiger", 100);

students.add(s1);//

students.add(s2);//

students.add(s3);//

s.display();

System.out.println(s.gethighest());

System.out.println(s.getlowest());

System.out.println(s.getAverage());

}

}

注意两点问题：

1： 变量名重复 s变量被覆盖

2：没有调用Vector.add方法添加元素

错误点我都已经给你注释出来了

并且贴出了正确的代码

结贴吧。。