Question

java里面使用string.format如何实现空格右填充？

Answer 1

java里面使用string.format实现空格右填充代码如下：

package cn.com.songjy;

import java.text.NumberFormat;

public class NumberFormatTest {

public static void main(String[] args) {

int i = 1;

NumberFormat nf = NumberFormat.getInstance();

nf.setGroupingUsed(false);

nf.setMaximumIntegerDigits(4);

nf.setMinimumIntegerDigits(4);

System.out.println(nf.format(i));

}

}

public class TestStringFormat { 

public static void main(String[] args) { 

int youNumber = 1; 

String str = String.format("%04d", youNumber); 

System.out.println(str); // 0001 

} 

}

private static final String STR_FORMAT = "0000"; 

public static String haoAddOne_2(String liuShuiHao){

Integer intHao = Integer.parseInt(liuShuiHao);

intHao++;

DecimalFormat df = new DecimalFormat(STR_FORMAT);

return df.format(intHao);

}