Java 使用indexOf搜索包含特定字母的字符串

我已经写出了下面的代码，我的目标是在提示符下输入一个字符串，并返回列表中包含该字符串的任何单词。我想我只是缺少了一些小东西，比如当我运行程序时，它会打印整个单词列表。任何帮助都将不胜感激

package assignment1;

import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class URLReader {
static List<String> words = new ArrayList<String>();

public static void main(String[] args) throws Exception {
    System.out.println("Please Input A String");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String letters = br.readLine();
    URL oracle = new URL("http://dl.dropbox.com/u/18678304/2011/BSc2/words.txt");
    BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null)
        words.add(inputLine);
        in.close();

for(int i = 0; i<words.size(); i++)
{
    if(words.get(i).indexOf(letters) >= 0);
        System.out.println(words.get(i));
}

}
}

包分配1；
导入java.net。*；
导入java.util.ArrayList；
导入java.util.List；
导入java.io.*；
公共类URL阅读器{
静态列表字=新的ArrayList（）；
公共静态void main（字符串[]args）引发异常{
System.out.println（“请输入字符串”）；
BufferedReader br=新的BufferedReader（新的InputStreamReader（System.in））；
字符串字母=br.readLine（）；
URL oracle=新URL（“http://dl.dropbox.com/u/18678304/2011/BSc2/words.txt");
BufferedReader in=新的BufferedReader（新的InputStreamReader（oracle.openStream（））；
字符串输入线；
而（（inputLine=in.readLine（））！=null）
添加（输入行）；
in.close（）；
对于（int i=0；i=0）；
System.out.println（words.get（i））；
}
}
}
您有一个
在if语句末尾：

package assignment1;

import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class URLReader {
static List<String> words = new ArrayList<String>();

public static void main(String[] args) throws Exception {
    System.out.println("Please Input A String");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String letters = br.readLine();
    URL oracle = new URL("http://dl.dropbox.com/u/18678304/2011/BSc2/words.txt");
    BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null)
        words.add(inputLine);
        in.close();

for(int i = 0; i<words.size(); i++)
{
    if(words.get(i).indexOf(letters) >= 0);
        System.out.println(words.get(i));
}

}
}

if(words.get(i).indexOf(letters) >= 0);
    System.out.println(words.get(i));

应该是：

package assignment1;

import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class URLReader {
static List<String> words = new ArrayList<String>();

public static void main(String[] args) throws Exception {
    System.out.println("Please Input A String");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String letters = br.readLine();
    URL oracle = new URL("http://dl.dropbox.com/u/18678304/2011/BSc2/words.txt");
    BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null)
        words.add(inputLine);
        in.close();

for(int i = 0; i<words.size(); i++)
{
    if(words.get(i).indexOf(letters) >= 0);
        System.out.println(words.get(i));
}

}
}

if(words.get(i).indexOf(letters) >= 0)
    System.out.println(words.get(i));

你有一个
在if语句末尾：

package assignment1;

import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class URLReader {
static List<String> words = new ArrayList<String>();

public static void main(String[] args) throws Exception {
    System.out.println("Please Input A String");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String letters = br.readLine();
    URL oracle = new URL("http://dl.dropbox.com/u/18678304/2011/BSc2/words.txt");
    BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null)
        words.add(inputLine);
        in.close();

for(int i = 0; i<words.size(); i++)
{
    if(words.get(i).indexOf(letters) >= 0);
        System.out.println(words.get(i));
}

}
}

if(words.get(i).indexOf(letters) >= 0);
    System.out.println(words.get(i));

应该是：

package assignment1;

import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class URLReader {
static List<String> words = new ArrayList<String>();

public static void main(String[] args) throws Exception {
    System.out.println("Please Input A String");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String letters = br.readLine();
    URL oracle = new URL("http://dl.dropbox.com/u/18678304/2011/BSc2/words.txt");
    BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null)
        words.add(inputLine);
        in.close();

for(int i = 0; i<words.size(); i++)
{
    if(words.get(i).indexOf(letters) >= 0);
        System.out.println(words.get(i));
}

}
}

if(words.get(i).indexOf(letters) >= 0)
    System.out.println(words.get(i));

一条语句不需要大括号{}，但始终使用它更安全：

package assignment1;

import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class URLReader {
static List<String> words = new ArrayList<String>();

public static void main(String[] args) throws Exception {
    System.out.println("Please Input A String");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String letters = br.readLine();
    URL oracle = new URL("http://dl.dropbox.com/u/18678304/2011/BSc2/words.txt");
    BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null)
        words.add(inputLine);
        in.close();

for(int i = 0; i<words.size(); i++)
{
    if(words.get(i).indexOf(letters) >= 0);
        System.out.println(words.get(i));
}

}
}

if(words.get(i).indexOf(letters) >= 0){
System.out.println(words.get(i));
}

一条语句不需要大括号{}，但始终使用它更安全：

package assignment1;

import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class URLReader {
static List<String> words = new ArrayList<String>();

public static void main(String[] args) throws Exception {
    System.out.println("Please Input A String");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String letters = br.readLine();
    URL oracle = new URL("http://dl.dropbox.com/u/18678304/2011/BSc2/words.txt");
    BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null)
        words.add(inputLine);
        in.close();

for(int i = 0; i<words.size(); i++)
{
    if(words.get(i).indexOf(letters) >= 0);
        System.out.println(words.get(i));
}

}
}

if(words.get(i).indexOf(letters) >= 0){
System.out.println(words.get(i));
}

我认为您需要编辑此代码。if语句后有一个分号，提前终止。我认为您需要编辑此代码。if语句后面有一个分号，可以提前终止。@TimmjyMorrissey您应该真正使用
String.contains
。@TimmjyMorrissey您应该真正使用
String.contains
。是的，但是如果他总是在代码中使用大括号，应该避免这个问题。是的，但如果他总是在代码中使用大括号，那么这个问题应该避免。