String ss1 = ""; String ss2 = ","; String ss3 = "a,b,"; String ss4 = "a,b,c"; String ss5 = "1,,123"; String ss6 = ",123,"; System.out.println("ss1长度:"+ss1.split(",").length); for (int a = 0; a < ss1.split(",").length; a++) { System.out.print(" index:"+a+" 值:"+ss1.split(",")[a]); } System.out.println(""); System.out.println("======================"); System.out.println("ss2长度:"+ss2.split(",").length); for (int a = 0; a < ss2.split(",").length; a++) { System.out.print(" index:"+a+" 值:"+ss2.split(",")[a]); } System.out.println(""); System.out.println("======================"); System.out.println("ss3长度:"+ss3.split(",").length); for (int a = 0; a < ss3.split(",").length; a++) { System.out.print(" index:"+a+" 值:"+ss3.split(",")[a]); } System.out.println(""); System.out.println("======================"); System.out.println("ss4长度:"+ss4.split(",").length); for (int a = 0; a < ss4.split(",").length; a++) { System.out.print(" index:"+a+" 值:"+ss4.split(",")[a]); } System.out.println(""); System.out.println("======================"); System.out.println("ss5长度:"+ss5.split(",").length); for (int a = 0; a < ss5.split(",").length; a++) { System.out.print(" index:"+a+" 值:"+ss5.split(",")[a]); } System.out.println(""); System.out.println("======================"); System.out.println("ss6长度:"+ss6.split(",").length); for (int a = 0; a < ss1.split(",").length; a++) { System.out.print(" index:"+a+" 值:"+ss6.split(",")[a]); } System.out.println(""); System.out.println("======================"); >》》》》>》>》》》输出 ss1长度:1 index:0 值: ====================== ss2长度:0 ====================== ss3长度:2 index:0 值:a index:1 值:b ====================== ss4长度:3 index:0 值:a index:1 值:b index:2 值:c ====================== ss5长度:3 index:0 值:1 index:1 值: index:2 值:123 ====================== ss6长度:2 index:0 值: ======================
String ss1 = ""; String ss2 = ","; String ss3 = "a,b,"; String ss4 = "a,b,c"; String ss5 = "1,,123"; String ss6 = ",123,";