java拼接字符串、格式化字符串方式

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String arg0 = "Bob"; String arg1 = "Alice"; System.out.println("hello," + arg0 + ". I am " + arg1 + ".");   //StringBuilder.append StringBuilder builder = new StringBuilder(); builder.append("hello,"); builder.append(arg0); builder.append(". I am "); builder.append(arg1); builder.append("."); System.out.println(builder.toString());   //String.format String formatStr = String.format("hello,%s. I am %s.", arg0, arg1); System.out.println(formatStr);   //MessageFormat.format String formattedText = MessageFormat.format("hello,{0}. I am {1}.", arg0, arg1); System.out.println(formattedText);

　　java拼接字符串、格式化字符串方式