chow to trim space in last line in java code example

Example 1: how to strip trailing spaces in java

String str = new String(" apples ");
str.trim(); // result is a nes string "apple"

Example 2: how to add spaces before string in java

String s = "%s Hellow World!";
    StringBuilder builder = new StringBuilder();
    for(int i=0;i<10;i++){
        builder.append(" ");
    }

    System.out.println(s.format(s,builder.toString()));