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Left pad a String with spaces (' ') in Java
Let us see an example first to understand how a string looks with left padding −
demotext //left padding with spaces 0000000demotext //left padding with 7 zeros
The following is our string −
String str = "Jack";
Now take a StringBuilder object −
StringBuilder strBuilder = new StringBuilder();
Perform left padding and extend the string length. The spaces that will be padded comes on the left. Append the spaces here −
while (strBuilder.length() + str.length() < 10) {
strBuilder.append(' ');
}The following is an example to pad a string to the left with spaces
Example
public class Demo {
public static void main(String[] args) {
String str = "Jack";
StringBuilder strBuilder = new StringBuilder();
// left padding with spaces
while (strBuilder.length() + str.length() < 10) {
strBuilder.append(' ');
}
// append
strBuilder.append(str);
String res = strBuilder.toString();
System.out.println(res);
}
}Output
Jack
Updated on 29-Jun-2020 05:33:33
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