void (String[] args) { String s = <weak_warning descr="Can be replaced with concatenation with empty string">String.valueOf</weak_warning>(1); s = 1 + <weak_warning descr="Can be replaced with concatenation with empty string">String.valueOf</weak_warning>(1); s = 1 + <weak_warning descr="Can be replaced with concatenation with empty string">Character.toString</weak_warning>('2'); s = 2 + <weak_warning descr="Can be replaced with concatenation with empty string">String.valueOf</weak_warning>(1 + 1); s = <weak_warning descr="Can be replaced with concatenation with empty string">String.valueOf</weak_warning>(1 + 1).trim(); }