From acbd5dfd14c786abfc5c907729b67d99477e1ae2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E6=9D=8E=E8=88=92=E6=B1=B6?= <3228916049@qq.com> Date: Sat, 3 Dec 2022 11:01:08 +0800 Subject: [PATCH 1/4] 20221203 java switch --- .../20221203 java switch.md" | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 "49 \346\235\216\350\210\222\346\261\266/20221203 java switch.md" diff --git "a/49 \346\235\216\350\210\222\346\261\266/20221203 java switch.md" "b/49 \346\235\216\350\210\222\346\261\266/20221203 java switch.md" new file mode 100644 index 0000000..adbc517 --- /dev/null +++ "b/49 \346\235\216\350\210\222\346\261\266/20221203 java switch.md" @@ -0,0 +1,24 @@ +System这类的大写，其他double的均小写 + +数据类型: +基数据类型:CPU直接可以拿来计算,也就是说他的值本身就可以直接使，传递的是变量对应的值 + +引用数据类型:引用类型他传递的是这个变量的内存地址，而不是值 + +1:字符串不能直接比大小,判断是否相等，要用equals。比如:判断a是否等于b,equals(b) + +2:从字符串中截取第一个字符，因为计算机通常第一位是计"0"，“ABC”＞a + + + +if和switch的小总结： + +if能做的switch 也能做，但是if能做的switch 不一定能做,if可以判断一个范围(区间的值)，而switch 只能判断特定一个值 + + + +```ja + +``` + + -- Gitee From 82c25bd9a01f81dc715eff45083dd9efad52cb1d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E6=9D=8E=E8=88=92=E6=B1=B6?= <3228916049@qq.com> Date: Sat, 3 Dec 2022 03:04:25 +0000 Subject: [PATCH 2/4] =?UTF-8?q?=E9=87=8D=E5=91=BD=E5=90=8D=2049=20?= =?UTF-8?q?=E6=9D=8E=E8=88=92=E6=B1=B6/49=20=E6=9D=8E=E8=88=92=E6=B1=B6.md?= =?UTF-8?q?=20=E4=B8=BA=2049=20=E6=9D=8E=E8=88=92=E6=B1=B6/=E8=BF=90?= =?UTF-8?q?=E7=AE=97=E7=AC=A6.md?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../\350\277\220\347\256\227\347\254\246.md" | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename "49 \346\235\216\350\210\222\346\261\266/49 \346\235\216\350\210\222\346\261\266.md" => "49 \346\235\216\350\210\222\346\261\266/\350\277\220\347\256\227\347\254\246.md" (100%) diff --git "a/49 \346\235\216\350\210\222\346\261\266/49 \346\235\216\350\210\222\346\261\266.md" "b/49 \346\235\216\350\210\222\346\261\266/\350\277\220\347\256\227\347\254\246.md" similarity index 100% rename from "49 \346\235\216\350\210\222\346\261\266/49 \346\235\216\350\210\222\346\261\266.md" rename to "49 \346\235\216\350\210\222\346\261\266/\350\277\220\347\256\227\347\254\246.md" -- Gitee From 1c731a28e1e7f52b8a8405df9213c696012198fc Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E6=9D=8E=E8=88=92=E6=B1=B6?= <3228916049@qq.com> Date: Sat, 3 Dec 2022 03:04:47 +0000 Subject: [PATCH 3/4] =?UTF-8?q?=E9=87=8D=E5=91=BD=E5=90=8D=2049=20?= =?UTF-8?q?=E6=9D=8E=E8=88=92=E6=B1=B6/49.md=20=E4=B8=BA=2049=20=E6=9D=8E?= =?UTF-8?q?=E8=88=92=E6=B1=B6/=E5=8F=98=E9=87=8F.md?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../\345\217\230\351\207\217.md" | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename "49 \346\235\216\350\210\222\346\261\266/49.md" => "49 \346\235\216\350\210\222\346\261\266/\345\217\230\351\207\217.md" (100%) diff --git "a/49 \346\235\216\350\210\222\346\261\266/49.md" "b/49 \346\235\216\350\210\222\346\261\266/\345\217\230\351\207\217.md" similarity index 100% rename from "49 \346\235\216\350\210\222\346\261\266/49.md" rename to "49 \346\235\216\350\210\222\346\261\266/\345\217\230\351\207\217.md" -- Gitee From 985bc81ddb1dd2a3340c1665d17cd08fd7096d1c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E6=9D=8E=E8=88=92=E6=B1=B6?= <3228916049@qq.com> Date: Sat, 3 Dec 2022 03:06:43 +0000 Subject: [PATCH 4/4] =?UTF-8?q?=E9=87=8D=E5=91=BD=E5=90=8D=2049=20?= =?UTF-8?q?=E6=9D=8E=E8=88=92=E6=B1=B6/=E7=AC=AC=E4=B8=89=E6=AC=A1?= =?UTF-8?q?=E4=BD=9C=E4=B8=9A.md=20=E4=B8=BA=2049=20=E6=9D=8E=E8=88=92?= =?UTF-8?q?=E6=B1=B6/=E5=A2=9E=E5=87=8F=E5=8F=98=E9=87=8F.md?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../\345\242\236\345\207\217\345\217\230\351\207\217.md" | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename "49 \346\235\216\350\210\222\346\261\266/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md" => "49 \346\235\216\350\210\222\346\261\266/\345\242\236\345\207\217\345\217\230\351\207\217.md" (100%) diff --git "a/49 \346\235\216\350\210\222\346\261\266/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md" "b/49 \346\235\216\350\210\222\346\261\266/\345\242\236\345\207\217\345\217\230\351\207\217.md" similarity index 100% rename from "49 \346\235\216\350\210\222\346\261\266/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md" rename to "49 \346\235\216\350\210\222\346\261\266/\345\242\236\345\207\217\345\217\230\351\207\217.md" -- Gitee