java 使用 System.out.write 打印到控制台
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Print to console using System.out.write
提问by ivorykoder
It is homework question.
是作业题。
Question:
问题：
"Use an array of integers with size 10 and print the content of the array using write( ) method.
Note: Please do not use System.out.println( ) method."
“使用大小为 10 的整数数组，并使用 write() 方法打印数组的内容。
注意：请不要使用 System.out.println() 方法。”
This is what I have tried so far, but it doesn't work.
这是我迄今为止尝试过的方法，但它不起作用。
int i = 0;
while (i != array.length) {
byte[] temp = new byte[4];
temp[0] = (byte) (array[i] & 256);
array[i] = array[i] >> 8;
temp[1] = (byte) (array[i] & 256);
array[i] = array[i] >> 8;
temp[2] = (byte) (array[i] & 256);
array[i] = array[i] >> 8;
temp[3] = (byte) (array[i] & 256);
System.out.write(temp, 0, 4);
i++;
}
I can't find a way to do this, please help me out.
我找不到办法做到这一点，请帮助我。
Thanks in advance. :)
提前致谢。:)
回答by deorst
void printInt(int x) {
String s = String.valueOf(x);
for(int i = 0; i < s.length(); i++) {
System.out.write(s.charAt(i));
}
System.out.write('\n');
}
Edit: prettier:
编辑：更漂亮：
void printInt(int x) {
String s = String.valueOf(x);
System.out.write(s.getBytes());
System.out.write('\n')
}
回答by Buhake Sindi
Have an integer array of size 10, i.e. int[] i = new int[10]and write each of them in System.out.write(int b)where the write()method accept an integer as parameter.
有大小为10，即一个整数数组int[] i = new int[10]并写入它们中的每在System.out.write(int b)其中write()方法接受一个整数作为参数。
This is really uglybut it worked....
这真的很丑，但它有效......
/**
*
*/
package testcases;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
/**
* @author The Elite Gentleman
*
*/
public class Test {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int[] array = {10, 20, 30, 40, 50};
StringBuffer sb = new StringBuffer();
for (int i: array) {
sb.append(String.valueOf(i));
}
try {
System.out.write(sb.toString().getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
回答by rapadura
Why are you making an array of bytes ? There is a write(int b) method.
你为什么要制作一个字节数组？有一个 write(int b) 方法。
Integer array = new Integer[10];
// populate array with some integers
for (Integer i : array) {
System.out.write((int)i);
}
even the cast (int)i isnt necessary as autoboxing will take care of that.
甚至演员 (int)i 也不是必需的，因为自动装箱会解决这个问题。
回答by anirvan
The trick is to convert each digit of the int into a char. and then write the char using System.out.write.
So for example, if one of the int values is 91. You'll need to doSystem.out.write('9');
System.out.write('1');
System.out.flush();
诀窍是将 int 的每个数字转换为 char。然后使用System.out.write.
例如，如果 int 值之一是 91。你需要做System.out.write('9');
System.out.write('1');
System.out.flush();
